Yamaha BIG BEAR YFM400NC Owner'S Manual Download Page 119 | Manualshive

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8-11

EBU00286

Spark plug inspection

The spark plug is an important engine
component and is easy to inspect. The
condition of the spark plug can indicate the
condition of the engine.
For example, a very white center electrode
porcelain color could indicate an intake air
leak or carburetion problem for that cylin-
der. Do not attempt to diagnose such prob-
lems yourself.
Instead, take the machine to a Yamaha
dealer. You should periodically remove
and inspect the spark plug because heat
and deposits will cause the spark plug to
slowly break down and erode.
If electrode erosion becomes excessive,
you should replace the spark plug with one
of the proper type.

Before installing the spark plug, measure
the electrode gap with a feeler gauge and
adjust to specification.

a. Spark plug gap

Standard spark plug:

DR8EA (NGK)

Spark plug gap:

0.6 ~ 0.7 mm (0.024 ~ 0.028 in)

All manuals and user guides at all-guides.com

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Summary of Contents for BIG BEAR YFM400NC

Page 1: ...EAD THIS MANUAL CAREFULLY It contains important safety information This ATV should not be ridden by anyone under 16 years of age WARNING YFM400NM C OWNER S MANUAL All manuals and user guides at all guides com a l l g u i d e s c o m ...

Page 2: ...echniques and skills necessary to ride your machine It also includes basic maintenance and inspection procedures If you have any questions regarding the op eration or maintenance of your machine please consult a Yamaha dealer AN IMPORTANT SAFETY MESSAGE READ THIS MANUAL TOGETHER WITH TIPS FOR THE ATV RIDER CAREFULLY AND COMPLETELY BEFORE OPERATING YOUR MACHINE MAKE SURE YOU UNDERSTAND ALL INSTRUCT...

Page 3: ...Symbol means ATTENTION BECOME ALERT YOUR SAFETY IS INVOLVED WARNING Failure to follow WARNING instructions could result in severe injury or death to the machine operator a bystander or a person inspecting or repairing the machine CAUTION A CAUTION indicates special precautions that must be taken to avoid damage to the machine NOTE A NOTE provides key information to make procedures easier or clear ...

Page 4: ...tions in effect at the time of manufacture Please check your local riding laws and regulations before operating this machine EBU00531 AFFIX DEALER LABEL HERE YFM400NM C OWNER S MANUAL 1999 by Yamaha Motor Corporation U S A 1st Edition September 1999 All rights reserved Any reprinting or unauthorized use without the written permission of Yamaha Motor Corporation U S A is expressly prohibited Printe...

Page 5: ...e 4 4 dlebar switches 4 5 ottle lever 4 6 ed limiter 4 7 nt brake lever 4 8 r brake pedal and lever 4 8 king brake 4 9 t pedal 4 10 erse knob 4 10 oil starter 4 11 tank cap 4 12 cock 4 13 ter choke 4 14 t 4 15 age box 4 16 nt carrier 4 16 r carrier 4 16 All manuals and user guides at all guides com ...

Page 6: ...lerate 6 5 decelerate 6 6 gine break in 6 7 king 6 8 king on a slope 6 9 essories and loading 6 10 NG YOUR ATV 7 1 ting to know your ATV 7 3 e with care and good dgement 7 4 careful where you ride 7 16 ning your ATV 7 23 mbing uphill 7 25 ing downhill 7 30 ssing a slope 7 32 All manuals and user guides at all guides com a l l g u i d e s c o m ...

Page 7: ...6 le inspection and brication 8 27 ke and shift pedals ake lever lubrication 8 27 eel removal 8 28 eel installation 8 28 ery 8 29 ery maintenance 8 30 e replacement 8 31 lacing the headlight bulb 8 33 dlight beam adjustment 8 35 ubleshooting 8 35 ubleshooting chart 8 37 All manuals and user guides at all guides com ...

Page 8: ...All manuals and user guides at all guides com ...

Page 9: ...1 1 EBU00464 LOCATION OF THE WARNING AND SPECIFICATION LABELS 1 567 2 3 4 All manuals and user guides at all guides com ...

Page 10: ...TH OPERATING TIRE PRESSURE Recommended FRONT 25kPa 0 25kgf cm2 3 6psi REAR 25kPa 0 25kgf cm2 3 6psi Minimum FRONT 22kPa 0 22kgf cm2 3 2psi REAR 22kPa 0 22kgf cm2 3 2psi Never set tire pressure below minimum It could cause the tire to dislodge from the rim LOADING TRAILER TOWING Cargo or a trailer can affect stability and handling Read owner s manual before loading or towing When riding with cargo ...

Page 11: ...1 3 3 4 NEVER sit here 5FU F4897 00 WARNING 80kg 176lbs LOAD LIMIT 5 All manuals and user guides at all guides com a l l g u i d e s c o m ...

Page 12: ...1 4 6 7 SHIFT PATTERN 5 4 3 2 1 N R 5FU F1578 00 All manuals and user guides at all guides com ...

Page 13: ...ng procedures de scribed Never operate an ATV without proper training or instruction Take a Training Course Beginners should receive training from a certified instructor Contact an authorized ATV dealer or call 1 800 447 4700 to find out about the training courses nearest you Always follow the age recommendation A child under 16 years old should never operate an ATV with engine size greater than 9...

Page 14: ... the terrain visibility and operating conditions and your experience Never attempt wheelies jumps or other stunts Always inspect your ATV each time you use it to make sure it is in safe operating con dition Always follow the inspection and maintenance procedures and schedules de scribed in this manual Always keep both hands on the handlebars and both feet on the footboards of the ATV during operat...

Page 15: ... top of a hill at high speed Always follow proper procedures for going down hills and for braking on hills as de scribed in this manual Check the terrain carefully before you start down any hill Shift your weight backward Never go down a hill at high speed Avoid going down a hill at an angle that would cause the vehicle to lean sharply to one side Go straight down the hill where possible Always fo...

Page 16: ... over obstacles as described in this manual Always be careful when skidding or sliding Learn to safely control skidding or sliding by practicing at low speeds and on level smooth terrain On extremely slippery sur faces such as ice go slowly and be very cautious in order to reduce the chance of skid ding or sliding out of control Never operate an ATV in fast flowing water or in water deeper than th...

Page 17: ...ated load capacity for an ATV Cargo should be properly distribut ed and securely attached Reduce speed and follow instructions in this manual for car rying cargo or pulling a trailer Allow greater distance for braking FOR MORE INFORMATION ABOUT ATV SAFETY call the Consumer Products Safety Com mission at 1 800 638 2772 or the ATV Distributor s Safety Hotline at 1 800 852 5344 All manuals and user g...

Page 18: ... of ignition such as the pi lot lights of water heaters and clothes dryers When transporting the machine in an other vehicle be sure it is kept upright and that the fuel cock is in the OFF position Otherwise fuel may leak out of the carburetor or fuel tank WHAT CAN HAPPEN Gasoline is poisonous and can cause in juries HOW TO AVOID THE HAZARD If you should swallow some gasoline or inhale a lot of ga...

Page 19: ...in a closed area WHAT CAN HAPPEN Exhaust fumes are poisonous and may cause loss of consciousness and death within a short time HOW TO AVOID THE HAZARD Always operate your machine in an area with adequate ventilation All manuals and user guides at all guides com ...

Page 20: ...heel 11 Rear brake lever 12 Parking brake lock plate 13 Starter choke 14 Reverse knob 15 Front brake lever 16 Throttle lever 17 Fuel gauge 18 Main switch 19 Handlebar switch ine you have purchased may differ slight ose shown in the figures of this manual All manuals and user guides at all guides com ...

Page 21: ...tion number identification number is stamped key as shown in the following illus This number can be used for order w key ntification number All manuals and user guides at all guides com a l l g u i d e s c o m ...

Page 22: ...bel el label is affixed to the frame he information on this label in the ovided This information will be o order spare parts from your dealer bel All manuals and user guides at all guides com ...

Page 23: ...41 Main switch Functions of the respective switch posi tions are as follows ON Engine can be started only at this position and the headlight and taillight come on when the light switch is on OFF All electrical circuits are switched off The key can be removed in this position All manuals and user guides at all guides com ...

Page 24: ...ral EBU00047 Oil temperature indicator light OIL TEMP When the oil temperature reaches a speci fied level this light comes on to warn that the engine oil temperature is too hot If the light comes on during operation stop the engine as soon as it is safe to do so and al low the engine to cool down for about 10 minutes CAUTION The engine may overheat if the ATV is overloaded If this happens reduce t...

Page 25: ...s on Check engine oil temperature Oiltemperatureindicator light does not come on Engine oil temperature and electrical circuit are OK Go ahead with riding Push start switch with the transmission in neutral Ask a Yamaha dealer to inspect the electrical circuit Oil tempera ture is low Allow to cool Oil tempera ture is high Oil temperature indicator light comes on momentarily All manuals and user gui...

Page 26: ...ches the red line refill the tank at the first opportunity 1 Fuel gauge NOTE If the machine runs out of fuel move the fuel cock lever to the RES position Ap proximately 4 0 L 0 9 Imp gal 1 1 US gal of fuel will be remaining in the tank All manuals and user guides at all guides com a l l g u i d e s c o m ...

Page 27: ...0055 Start switch The starter motor cranks the engine when this switch is pushed CAUTION See starting instructions prior to starting engine see page 6 1 for details EBU00058 Lights switch LIGHTS Turn the switch to for the low beam and taillight Turn the switch to for the high beam and taillight CAUTION Do not use the headlight with the engine turned off for more than thirty minutes The battery may...

Page 28: ...to be sure it is operating smoothly Make sure it returns to the idle position as soon as the lever is released WARNING POTENTIAL HAZARD Malfunction of throttle WHAT CAN HAPPEN The throttle could be hard to operate making it difficult to speed up or slow down when you need to This could cause an accident HOW TO AVOID THE HAZARD Check the operation of the throttle lever before you start the engine I...

Page 29: ... a 12 mm 0 47 in WARNING POTENTIAL HAZARD Improper adjustment of the speed limit er and throttle WHAT CAN HAPPEN The throttle cable could be damaged Improper throttle operation could re sult You could lose control have an ac cident or be injured HOW TO AVOID THE HAZARD Do not turn the speed adjuster out more than 12 mm 0 47 in Always make sure the throttle lever free play is adjusted to 3 5 mm 0 1...

Page 30: ... Front brake lever EBU00073 Rear brake pedal and lever The brake pedal is located on the right side of the machine and the brake lever is locat ed on the left handlebar Push down on the pedal or pull the lever toward the handle bar to apply the rear brake 1 1 Rear brake pedal 1 Rear brake lever 1 All manuals and user guides at all guides com ...

Page 31: ... could start moving unexpect edly if the parking brake is not applied before starting the engine This could cause loss of control or a collision The brake could overheat if you ride the ATV without releasing the parking brake You could lose braking performance which could cause an accident You could also wear out the brakes prema turely HOW TO AVOID THE HAZARD Always set the parking brake before s...

Page 32: ...f the engine Reverse is at the bottom position Neutral is one position above reverse 1 Shift pedal N Neutral R Reverse EBU00088 Reverse knob The reverse knob is used to shift into re verse gear Refer to section Reverse knob operation and reverse driving page 6 4 before op erating this machine in reverse gear 1 Reverse knob All manuals and user guides at all guides com ...

Page 33: ...Recoil starter 1 WARNING POTENTIAL HAZARD Starting the engine in gear and or start ing the engine without setting the park ing brake WHAT CAN HAPPEN The ATV could start to move unexpect edly which could cause an accident HOW TO AVOID THE HAZARD Put the transmission in neutral and set the parking brake before starting the engine All manuals and user guides at all guides com ...

Page 34: ...4 12 EBU00092 Fuel tank cap Remove the fuel tank cap by turning it counterclockwise 1 Fuel tank cap All manuals and user guides at all guides com ...

Page 35: ...position when the engine is not running ON With the lever in this position fuel flows to the carburetor Normal riding is done with the lever in this position RES This indicates reserve If you run out of fuel while riding turn the lever to this position THEN FILL THE FUEL TANK AT THE FIRST OPPORTUNITY After refuelling return the fuel cock lever to the ON position All manuals and user guides at all ...

Page 36: ...eparate starter circuit sup plies this mixture Move in direction a to turn on the starter choke Move in direction b to turn off the starter choke Refer to Starting a cold engine for prop er operation See page 6 1 OFF a b All manuals and user guides at all guides com a l l g u i d e s c o m ...

Page 37: ...and pull up the seat at the rear 1 Seat lock lever To install the seat insert the projections on the front of the seat into the seat holders and push down on the seat at the rear NOTE Make sure that the seat is securely fitted All manuals and user guides at all guides com ...

Page 38: ...harply edged prod ucts directly in the storage box If they must be stored wrap them in appropriate cushion material Maximum load limit 2 kg 4 4 lb EBU00582 Front carrier EBU00583 Rear carrier Maximum load limit 40 kg 88 lb Maximum load limit 80 kg 176 lb All manuals and user guides at all guides com ...

Page 39: ... the adjuster in direction b a Increase spring preload b Decrease spring preload A B C D E a b WARNING POTENTIAL HAZARD Improper shock absorber adjustment WHAT CAN HAPPEN Uneven adjustment can cause poor han dling and loss of stability which could lead to an accident HOW TO AVOID THE HAZARD Always adjust the shock absorbers on the left and right side to the same set ting Standard position B A Mini...

Page 40: ...s Adjust the spring preload as follows To increase the spring preload turn the ad juster in direction a To decrease the spring preload turn the adjuster in direction b a Increase spring preload b Decrease spring preload A B C D E b a Standard position B A Minimum Soft E Maximum Hard All manuals and user guides at all guides com ...

Page 41: ...the main switch is in the ON position 1 Turn the headlight to the OFF posi tion 2 Start the engine See page 6 1 6 3 3 Open the cap and insert the power plug into the auxiliary jack 4 When the auxiliary jack is not being used cover it with the cap Maximum rated capacity for the auxiliary DC jack DC 12 V 120 W 10 A 1 Auxiliary DC jack 2 Cap All manuals and user guides at all guides com a l l g u i d...

Page 42: ...e en gine running or with the headlight turned on the battery will lose its charge and engine starting may be come difficult Do not use an automotive cigarette lighter or other accessory with a plug that gets hot The jack can be dam aged EBU00112 WARNING Indicates a potential hazard that could result in serious injury or death All manuals and user guides at all guides com ...

Page 43: ...lay and pedal height Fuel tank Check fuel level Fill with fuel if necessary 5 5 5 6 Engine oil Check oil level Fill with oil if necessary 5 7 8 5 8 8 Final gear oil Check for leakage 5 8 8 9 8 10 Throttle Check for proper throttle cable operation 5 8 8 18 Wheels and tires Check tire pressure wear and damage 5 9 5 12 8 28 8 29 Fittings and Fasteners Check all fittings and fasteners 5 8 Lights Check...

Page 44: ...ibility of an accident or equipment damage HOW TO AVOID THE HAZARD Always inspect your ATV each time you use it to make sure the ATV is in safe op erating condition Always follow the inspection and main tenance procedures and schedules de scribed in the Owner s Manual 5 5 5 5 5 6 7 8 9 50 55 55 55 55 All manuals and user guides at all guides com ...

Page 45: ...ee pages 8 20 8 22 NOTE If DOT 4 is not available DOT 3 can be used Recommended brake fluid DOT 4 3 Brake fluid leakage Check to see if any brake fluid is leak ing out of the hose joint or master cyl inder of the front brake Apply the brake firmly for one minute If the le ver moves slowly inward there may be a leak in the brake system If there is any leakage the brake system should be inspected by...

Page 46: ...ccident HOW TO AVOID THE HAZARD Always check the brakes at the start of every ride Do not ride the ATV if you find any problem with the brakes If a problem cannot be corrected by the ad justment procedures provided in this manual have the ATV inspected by a Yamaha dealer All manuals and user guides at all guides com a l l g u i d e s c o m ...

Page 47: ...te nance cost If unleaded gasoline is not available then leaded regular gasoline can be used Recommended fuel UNLEADED FUEL Fuel tank capacity Total 15 L 3 3 Imp gal 4 0 US gal Reserve 4 0 L 0 9 Imp gal 1 1 US gal Gasohol There are two types of gasohol gasohol containing ethanol and that containing methanol Gasohol containing ethanol can be used if ethanol content does not exceed 10 Gasohol contai...

Page 48: ...ed fuel could spill out due to heat from the engine or the sun HOW TO AVOID THE HAZARD Do not overfill the fuel tank Be careful not to spill fuel especially on the engine or exhaust pipe Wipe up any spilled fuel immediately Be sure the fuel tank cap is closed securely Do not refuel right after the engine has been running and is still very hot All manuals and user guides at all guides com ...

Page 49: ... SG type or higher CAUTION Be sure to use motor oils that do not con tain anti friction modifiers Passenger car motor oils often labeled Energy Conserving contain anti friction additives which will cause clutch and or starter clutch slippage resulting in re duced component life and poor engine performance Oil quantity Periodic oil change 2 9 L 2 6 Imp qt 3 1 US qt With oil filter replacement 3 0 L...

Page 50: ...e used Recommended oil SAE 80 API GL 4 Hypoid gear oil EBU00151 Throttle lever Check to see that the throttle lever oper ates correctly It must open smoothly and spring back to idle position when released Repair as necessary for proper operation EBU00152 Fittings and Fasteners Always check the tightness of chassis fittings and fasteners before a ride Take the ma chine to a Yamaha dealer or refer t...

Page 51: ...V with improper tires or with improper or uneven tire pressure WHAT CAN HAPPEN Use of improper tires on this ATV or op eration of this ATV with improper or un even tire pressure may cause loss of control increasing your risk of accident HOW TO AVOID THE HAZARD 1 The tires listed below have been ap proved by Yamaha Motor Co Ltd for this model Other tire combinations are not recommended Manufacturer...

Page 52: ...fied could cause the tire to dis lodge from the rim under severe riding conditions The following are minimums Front 22 kPa 0 22 kgf cm2 3 2 psi Rear 22 kPa 0 22 kgf cm2 3 2 psi 4 Use no more than the following pres sures when seating the tire beads Front 250 kPa 2 5 kgf cm2 36 psi Rear 250 kPa 2 5 kgf cm2 36 psi Higher pressures may cause the tire to burst Inflate the tires very slowly and careful...

Page 53: ...in the gauge could cause the first reading to be incor rect Set pressure with tires cold Set tire pres sures to the following specifications Recommended pressure Minimum Maximum Front 25 kPa 0 25 kgf cm2 3 6 psi 22 kPa 0 22 kgf cm2 3 2 psi 28 kPa 0 28 kgf cm2 4 0 psi Rear 25 kPa 0 25 kgf cm2 3 6 psi 22 kPa 0 22 kgf cm2 3 2 psi 28 kPa 0 28 kgf cm2 4 0 psi 1 Low pressure tire gauge All manuals and u...

Page 54: ...5 12 EBU00160 Tire wear limit When the tire groove decreases to 3 mm 0 12 in due to wear replace the tire a 3 mm 0 12 in All manuals and user guides at all guides com ...

Page 55: ...o not understand ask your Yamaha dealer EBU00507 Starting a cold engine 1 Set the parking brake 2 Turn the fuel cock to ON 3 Turn the main switch to ON and the engine stop switch to 4 Shift the transmission into neutral WARNING POTENTIAL HAZARD Freezing control cables in cold weather WHAT CAN HAPPEN You could be unable to control the ATV which could lead to an accident or colli sion HOW TO AVOID T...

Page 56: ... engine 5 Use the starter choke in reference to the figure Position 1 Cold engine start ambient temperature below 5 C 40 F Position 2 Cold engine start ambient temperature at 0 C 30 F 30 C 90 F and warming up position Position 3 Cold engine start ambient temperature above 25 C 80 F and warm engine start posi tion a Starter choke lever 1 Fully open 2 Half open 3 Closed 6 Completely close the thrott...

Page 57: ...ion 2 keep the starter choke in this position to warm up the engine 8 Continue warming up the engine until it idles smoothly and return the starter choke to position 3 before riding CAUTION See the Engine break in section prior to operating engine for the first time EBU00180 Starting a warm engine To start a warm engine refer to the Start ing a cold engine section The starter choke should not be u...

Page 58: ... down on the shift pedal NOTE When in reverse the reverse indicator light should be on If the light does not come on ask a Yamaha dealer to inspect the machine 4 Check behind you for people or obsta cles then release the rear brake lever 5 Open the throttle lever gradually and continue to watch to the rear while backing WARNING POTENTIAL HAZARD Improperly operating in reverse WHAT CAN HAPPEN You c...

Page 59: ...Shift pedal N Neutral R Reverse CAUTION Do not coast for long periods with the en gine off and do not tow the machine a long distance Even with gears in neutral the transmission is only properly lubricat ed when the engine is running Inadequate lubrication may damage the transmission EBU00205 To start out and accelerate 1 Release the throttle lever CAUTION Always close the throttle while shifting ...

Page 60: ...elerate When slowing down or stopping release the throttle and apply the brakes smoothly and evenly As you slow down shift to a lower gear Be sure that the engine has suf ficiently slowed before engaging a lower gear Improper use of the brakes or shifting can cause the tires to lose traction reduc ing control and increasing the possibility of an accident WARNING POTENTIAL HAZARD Engaging a lower g...

Page 61: ...re sult in excessive engine heating must be avoided However momentary 2 3 sec onds maximum full throttle operation un der load does not harm the engine Each full throttle acceleration sequence should be followed with a substantial rest period for the engine by cruising at lower r min so the engine can rid itself of the temporary build up of heat If any abnormality is noticed during this period con...

Page 62: ...but do not use full throttle at any time 3 After break in Avoid prolonged full throttle opera tion Vary speeds occasionally EBU00211 Parking When parking stop the engine and shift into neutral Turn the fuel cock to OFF and apply the parking brake 1 Lock plate All manuals and user guides at all guides com ...

Page 63: ...rk on an incline put the machine in low gear apply the parking brake and block the front and rear wheels with rocks or other objects Do not park the ATV at all on hills that are so steep you could not walk up them easily 1 Bring the machine to a stop by apply ing the brakes in low gear 2 Stop the engine 3 With the rear brake lever and pedal ap plied apply the parking brake and slowly release the r...

Page 64: ...ose a genuine Yamaha accessory or one that is equivalent in design and quality Accessories should be rigidly and se curely mounted An accessory which can shift position or come off while you are riding could affect your ability to control the ATV Do not mount an accessory where it could interfere with your ability to con trol the ATV Examples include but are not limited to a heavy or bulky object ...

Page 65: ... point 15 kg 33 lb Do not exceed the maximum tongue weight You can measure tongue weight with a bathroom scale Put the tongue of the loaded trailer on the scale with the tongue at hitch height Adjust the load in the trailer if necessary to reduce the weight on hitch If you are carrying cargo and towing a trailer include the tongue weight in the maximum vehicle load limit Load cargo on the carrier ...

Page 66: ...s and rough terrain Choose terrain carefully Added weight affects the stability and handling of the ATV WARNING POTENTIAL HAZARD Overloading this ATV or carrying or towing cargo improperly WHAT CAN HAPPEN Could cause changes in vehicle handling which could lead to an accident HOW TO AVOID THE HAZARD Never exceed the stated load capacity for this ATV Cargo should be properly distributed and securel...

Page 67: ...E 6 13 EBU00543 WARNING Indicates a potential hazard that could result in serious injury or death All manuals and user guides at all guides com ...

Page 68: ...7 1 E 7 1 RIDING YOUR ATV 7 All manuals and user guides at all guides com ...

Page 69: ...7 2 All manuals and user guides at all guides com ...

Page 70: ...ctice over a period of time Take the time to learn the basic techniques well before at tempting more difficult maneuvers Riding your new ATV can be a very enjoy able activity providing you with hours of pleasure But it is essential to familiarize yourself with the operation of the ATV to achieve the skill necessary to enjoy riding safely Before you begin to ride be sure you have read this Owner s ...

Page 71: ...r does not know how to operate the ATV properly in dif ferent situations and on different types of terrain Riding your machine requires skills ac quired through practice over a period of time Take the time to learn the basic techniques well before attempting more difficult ma neuvers HOW TO AVOID THE HAZARD Beginning and inexperienced operators should complete the certified training course offered...

Page 72: ...recommenda tions for this ATV WHAT CAN HAPPEN Use by children of ATVs that are not rec ommended for their age can lead to se vere injury or death of the child HOW TO AVOID THE HAZARD A child under 16 should never operate an ATV with engine size greater than 90cc All manuals and user guides at all guides com ...

Page 73: ... HAPPEN Greatly reduces your ability to balance and control this ATV Could cause an ac cident resulting in harm to you and or your passenger HOW TO AVOID THE HAZARD Never carry a passenger The long seat is to allow the operator to shift position as needed during operation It is not for carrying passengers All manuals and user guides at all guides com ...

Page 74: ...ident Operating without eye protection can result in an accident and increases your chances of a severe injury in the event of an accident Operating without protective clothing increases your chances of severe injury in the event of an accident HOW TO AVOID THE HAZARD Always wear an approved motorcycle helmet that fits properly You should also wear eye protection goggles or face shield gloves boot...

Page 75: ... HAZARD Operating this ATV after consuming al cohol or drugs WHAT CAN HAPPEN Could seriously affect your judgment Could cause you to react more slowly Could affect your balance and percep tion Could result in an accident HOW TO AVOID THE HAZARD Never consume alcohol or drugs before or while driving this ATV All manuals and user guides at all guides com ...

Page 76: ...ow the in spection and maintenance procedures and schedules described in the Owner s Manual WARNING POTENTIAL HAZARD Operating this ATV with improper tires or with improper or uneven tire pres sure WHAT CAN HAPPEN Use of improper tires on this ATV or op eration of this ATV with improper or un even tire pressure may cause loss of control increasing your risk of an acci dent HOW TO AVOID THE HAZARD ...

Page 77: ...the ATV which can result in an acci dent HOW TO AVOID THE HAZARD Always go at a speed that is proper for the terrain visibility and operating con ditions and your experience Speed limiter For riders inexperienced with this model this model is equipped with a speed limiter in the throttle lever housing The speed limiter limits the power and top speed of the machine Turning the screw in decreas es t...

Page 78: ...al weight of trailer and cargo 410 kg 904 lb Tongue weight vertical weight on trailer hitch point 15 kg 33 lb WARNING POTENTIAL HAZARD Overloading this ATV or carrying or towing cargo improperly WHAT CAN HAPPEN Could cause changes in vehicle handling which could lead to an accident HOW TO AVOID THE HAZARD Never exceed the stated load capacity for this ATV Cargo should be properly distributed and s...

Page 79: ...ng even one hand or foot can re duce your ability to control the ATV or could cause you to lose your balance and fall off of the ATV If you remove a foot from a footboard your foot or leg may come into contact with the rear wheels which could injure you or cause an accident HOW TO AVOID THE HAZARD Always keep both hands on the handle bars and both feet on the footboards of your ATV during operatio...

Page 80: ...WARNING POTENTIAL HAZARD Attempting wheelies jumps and other stunts WHAT CAN HAPPEN Increases the chance of an accident in cluding an overturn HOW TO AVOID THE HAZARD Never attempt stunts such as wheelies or jumps Don t try to show off All manuals and user guides at all guides com ...

Page 81: ...ould lead to an accident HOW TO AVOID THE HAZARD Never modify this ATV through improp er installation or use of accessories All parts and accessories added to this ve hicle should be genuine Yamaha or equivalent components designed for use on this ATV and should be installed and used according to instructions If you have questions consult an autho rized ATV dealer All manuals and user guides at al...

Page 82: ... where pedestrians or children are not likely to touch it WARNING POTENTIAL HAZARD Hot exhaust system WHAT CAN HAPPEN Someone touching the exhaust system during or after operation could be burned HOW TO AVOID THE HAZARD Do not touch the hot exhaust system Do not park the machine in a place where others might be likely to touch it All manuals and user guides at all guides com ...

Page 83: ...rating this ATV on paved surfaces WHAT CAN HAPPEN ATVs are designed for off road use only Paved surfaces may seriously affect handling and control of the ATV and may cause the vehicle to go out of con trol HOW TO AVOID THE HAZARD Always avoid paved surfaces including sidewalks driveways parking lots and streets All manuals and user guides at all guides com ...

Page 84: ...D Operating this ATV on public streets roads or highways WHAT CAN HAPPEN You can collide with another vehicle HOW TO AVOID THE HAZARD Never operate this ATV on any public street road or highway even a dirt or gravel one In many states it is illegal to operate ATVs on public streets roads and high ways All manuals and user guides at all guides com ...

Page 85: ...o use extra care when operating this ATV on unfamiliar terrain WHAT CAN HAPPEN You can come upon hidden rocks bumps or holes without enough time to react Could result in the ATV overturning or going out of control HOW TO AVOID THE HAZARD Go slowly and be extra careful when op erating on unfamiliar terrain Always be alert to changing terrain con ditions when operating the ATV All manuals and user g...

Page 86: ...le control which could result in an acci dent including an overturn HOW TO AVOID THE HAZARD Do not operate on excessively rough slippery or loose terrain until you have learned and practiced the skills neces sary to control the ATV on such terrain Always be especially cautious on these kinds of terrain All manuals and user guides at all guides com a l l g u i d e s c o m ...

Page 87: ...g in areas where you might not be seen by other off road vehicles Do not ride in areas posted no trespass ing Do not ride on private property with out getting permission WHAT CAN HAPPEN You could be in a collision You could be injured HOW TO AVOID THE HAZARD Always mount a caution flag on the ma chine to make you more visible Watch carefully for other vehicles All manuals and user guides at all gu...

Page 88: ...in or clothing to come in contact with these components With the engine idling lift the shift pedal to the 1st gear position and then release the parking brake Apply the throttle slowly and smoothly The centrifugal clutch will engage and you will start to accelerate Once the ATV has attained adequate speed release the throttle and lift the shift pedal to the 2nd gear position Release the shift ped...

Page 89: ...Improper use of the brakes or shifting can cause the tires to lose traction reduc ing control and increasing the possibility of an accident WARNING POTENTIAL HAZARD Engaging a lower gear when the engine speed is too high WHAT CAN HAPPEN The wheels could stop rotating This could cause loss of control an accident and injury It could also cause engine or drive train damage HOW TO AVOID THE HAZARD Mak...

Page 90: ...ing a collision or overturn As you approach a curve slow down and begin to turn the handlebars in the desired direction As you do so put your weight on the footboard to the outside of the turn opposite your desired direction and lean your upper body into the turn Use the throttle to maintain an even speed through the turn This maneuver will let the wheel on the inside of the turn slip slightly all...

Page 91: ...que you should be able to perform it at higher speeds or in tighter curves Improper riding procedures such as abrupt throttle changes excessive braking incor rect body movements or too much speed for the sharpness of the turn may cause the ATV to tip If the ATV begins to tip over to the outside while negotiating a turn lean more to the inside It may also be nec essary to gradually let off on the t...

Page 92: ... POTENTIAL HAZARD Operating on excessively steep hills WHAT CAN HAPPEN The vehicle can overturn more easily on extremely steep hills than on level sur faces or small hills It is important when climbing a hill to make sure that your weight is transferred for ward on the ATV This can be accom plished by leaning forward and on steeper inclines standing on the footboards and leaning forward over the h...

Page 93: ...ual Always check the terrain carefully be fore you start up any hill Never climb hills with excessively slip pery or loose surfaces Shift your weight forward Never open the throttle suddenly or make sudden gear changes The ATV could flip over backwards Never go over the top of any hill at high speed An obstacle a sharp drop or another vehicle or person could be on the other side of the hill All ma...

Page 94: ...control or cause ATV to overturn HOW TO AVOID THE HAZARD Never attempt to turn the ATV around on any hill until you have mastered the turning technique as described in the Owner s Manual on level ground Be very careful when turning on any hill Avoid crossing the side of a steep hill if possible When crossing the side of a hill Always follow proper procedures as de scribed in the Owner s Manual Avo...

Page 95: ...ck wards Instead dismount the ATV immedi ately on the uphill side WARNING POTENTIAL HAZARD Stalling rolling backwards or improper ly dismounting while climbing a hill WHAT CAN HAPPEN Could result in ATV overturning HOW TO AVOID THE HAZARD Use proper gear and maintain steady speed when climbing a hill If you lose all forward speed Keep weight uphill Apply the brakes Lock parking brake after you are...

Page 96: ... on uphill side or to a side if pointed straight uphill Turn the ATV around and remount following the pro cedure described in the Owner s Manu al All manuals and user guides at all guides com a l l g u i d e s c o m ...

Page 97: ...angles which could allow the ATV to tip or roll over Carefully choose your path and ride no faster than you will be able to react to obstacles which may appear WARNING POTENTIAL HAZARD Going down a hill improperly WHAT CAN HAPPEN Could cause loss of control or cause ATV to overturn HOW TO AVOID THE HAZARD Always follow proper procedures for going down hills as described in this Owner s Manual Note...

Page 98: ...7 31 All manuals and user guides at all guides com ...

Page 99: ...riding on slopes be sure not to make sharp turns ei ther up or down hill If your ATV does begin to tip over gradual ly steer in the downhill direction if there are no obstacles in your path As you re gain proper balance gradually steer again in the direction you wish to travel WARNING POTENTIAL HAZARD Improperly crossing hills or turning on hills WHAT CAN HAPPEN Could cause loss of control or caus...

Page 100: ... of a hill Always follow proper procedures as de scribed in the Owner s Manual Avoid hills with excessively slippery or loose surfaces Shift your weight to the uphill side of the ATV All manuals and user guides at all guides com ...

Page 101: ...NTIAL HAZARD Operating this ATV through deep or fast flowing water WHAT CAN HAPPEN Tires may float causing loss of traction and loss of control which could lead to an accident HOW TO AVOID THE HAZARD Never operate this ATV in fast flowing water or in water deeper than that spec ified in your Owner s Manual Remember that wet brakes may have reduced stopping ability Test your brakes after leaving wa...

Page 102: ...gained proper braking ability CAUTION After riding your ATV in water be sure to drain the trapped water by removing the check hose at the bottom of the air filter case Wash the ATV in fresh water if it has been operated in salt water or muddy con ditions 1 Check hose 1 All manuals and user guides at all guides com ...

Page 103: ...control and damage to the ATV may result WARNING POTENTIAL HAZARD Improperly operating over obstacles WHAT CAN HAPPEN Could cause loss of control or a colli sion Could cause the ATV to overturn HOW TO AVOID THE HAZARD Before operating in a new area check for obstacles Never attempt to ride over large obsta cles such as large rocks or fallen trees When you go over obstacles always fol low proper pr...

Page 104: ...7 37 All manuals and user guides at all guides com ...

Page 105: ...ront wheels to slide in loose or slippery condi tions positioning your weight over the front wheels will sometimes help If the rear wheels of your ATV start to slide sideways control can usually be regained if there is room to do so by steering in the direction of the slide Applying the brakes or accelerating is not recommended until you have corrected the slide All manuals and user guides at all ...

Page 106: ...y be lost WARNING POTENTIAL HAZARD Skidding or sliding improperly WHAT CAN HAPPEN You may lose control of this ATV You may also regain traction unexpectedly which may cause the ATV to overturn HOW TO AVOID THE HAZARD Learn to safely control skidding or slid ing by practicing at low speeds and on level smooth terrain On extremely slippery surfaces such as ice go slowly and be very cautious in or de...

Page 107: ... necessary gradually let off the throttle and or steer to the outside of the turn See pages 7 23 7 24 If your ATV starts to slide sideways Steer in the direction of the slide if you have the room Applying the brakes or accelerating is not recommended until you have cor rected the slide See pages 7 38 7 39 If your ATV can t make it up a hill you are trying to climb Turn the ATV around if you still ...

Page 108: ...r dismount on the uphill side See pages 7 32 7 33 If your ATV encounters shallow water Ride slowly and carefully through slow moving water watching for obstacles Be sure to let water drain from the ATV and CHECK YOUR BRAKES FOR PROP ER OPERATION when you come out of the water Do not continue to ride your ATV until you have regained adequate braking ability See pages 7 34 7 35 WARNING Indicates a p...

Page 109: ...N HAPPEN Moving parts can catch clothing or parts of the body causing injury Electrical components can cause shocks or can start fires HOW TO AVOID THE HAZARD Turn off the engine when performing maintenance unless otherwise specified EBU00535 Owner s manual and tool kit You are recommended to put this owner s manual in the vinyl bag and always carry it under the seat as shown Put the owner s tool ...

Page 110: ...the torque settings and adjust them as necessary 1 2 WARNING POTENTIAL HAZARD Operating this ATV with improper mod ifications WHAT CAN HAPPEN Improper installation of accessories or modification of this vehicle may cause changes in handling which in some situ ations could lead to an accident HOW TO AVOID THE HAZARD Never modify this ATV through improp er installation or use of accessories All part...

Page 111: ... Check breather hose for cracks or damage Replace if necessary Exhaust system Check leakage Retighten if necessary Replace gasket if necessary Spark arrester Clean Fuel line Check fuel hose for cracks or damage Replace if necessary Engine oil Replace Warm engine before draining Engine oil filter Replace Engine oil strainer Clean Final gear oil Check oil level oil leakage Replace every 12 months Fr...

Page 112: ... Check all chassis fittings and fasteners Correct if necessary ITEM ROUTINE INITIAL EVERY 1 month 3 months 6 months 6 months 1 year NOTE Brake fluid replacement 1 When disassembling the master cylin der or caliper cylinder replace the brake fluid Normally check the brake fluid level and add fluid as required 2 On the inner parts of the master cylinder and caliper cylinder replace the oil seals eve...

Page 113: ...er hole without screwing it in 1 Dipstick NOTE Wait a few minutes until the oil level set tles before checking 1 d Remove the dipstick and inspect the oil level e The oil level should be between the maximum and minimum marks If the level is low add oil to raise it to the proper level CAUTION Be sure no foreign material enters the crankcase 1 Maximum level mark 2 Minimum level mark 1 2 All manuals ...

Page 114: ... engine d Remove the dipstick and drain plug to drain the oil CAUTION When removing the drain plug the com pression spring oil strainer and O ring will fall out Take care not to lose these parts 1 Drain plug 2 O ring 3 Compression spring 4 Oil strainer e Remove the oil filter cover and oil filter 1 Filter cover 2 Filter cover bolt 3 1 2 All manuals and user guides at all guides com ...

Page 115: ...ring compression spring and oil strainer 1 O ring i Fill the engine with oil and install the dipstick CAUTION Be sure no foreign material enters the crankcase Tightening torque Drain plug engine 32 Nm 3 2 m kg 23 ft lb Filter cover bolt 10 Nm 1 0 m kg 7 2 ft lb Recommended oil See page 5 7 Oil quantity Periodic oil change 2 9 L 2 6 Imp qt 3 1 US qt With oil filter replacement 3 0 L 2 6 Imp qt 3 2 ...

Page 116: ...gine and keep it idling until oil begins to seep from the oil gallery If no oil comes out after one minute turn the engine off so it will not seize and find the cause d Restart the engine and check the oil pressure e After checking tighten the oil gallery bolt to the specified torque 1 Oil gallery bolt 2 Cloth CAUTION Be sure to inspect the oil pressure after re placing the engine oil Tightening t...

Page 117: ...s low add oil to raise it to the proper level CAUTION Be sure no foreign material enters the final gear case c Install the oil filler bolt and tighten to the specified torque Tightening torque Oil filler bolt 23 Nm 2 3 m kg 17 ft lb 1 Final gear oil 2 Correct oil level 3 Oil filler bolt 2 Final gear oil replacement a Remove the final gear case cover 1 2 3 All manuals and user guides at all guides ...

Page 118: ...ear case with oil CAUTION Be sure no foreign material enters the final gear case g Install the filler bolt and tighten to the specified torque h Check for oil leakage If oil leakage is found check for the cause i Reinstall the final gear case cover Recommended oil SAE 80 API GL 4 Hypoid gear oil Oil quantity Periodic oil change 0 23 L 0 20 Imp qt 0 24 US qt Total amount 0 25 L 0 22 Imp qt 0 26 US ...

Page 119: ... prob lems yourself Instead take the machine to a Yamaha dealer You should periodically remove and inspect the spark plug because heat and deposits will cause the spark plug to slowly break down and erode If electrode erosion becomes excessive you should replace the spark plug with one of the proper type Before installing the spark plug measure the electrode gap with a feeler gauge and adjust to s...

Page 120: ...Nm 1 75 m kg 12 5 ft lb EBU00589 Air filter cleaning NOTE There is a check hose at the bottom of the air filter case If dust or water collects in this hose empty the hose and clean the air filter element and air filter case 1 Check hose 1 Remove the seat Refer to page 4 15 for removal and installation proce dures 2 Remove the air filter case cover 1 All manuals and user guides at all guides com ...

Page 121: ...maged replace it 6 Wash the foam cover gently but thor oughly in water or solvent 7 Squeeze the excess water or solvent out of the foam cover and let it dry WARNING POTENTIAL HAZARD Using low flash point solvents or gaso line to clean the foam cover WHAT CAN HAPPEN Low flash point solvents or gasoline can catch fire or explode HOW TO AVOID THE HAZARD Use parts cleaning solvent to clean the foam co...

Page 122: ...ime filter ele ment maintenance is performed check the air inlet to the filter case for obstructions Check the air cleaner rubber joint to the carburetor and manifold fittings for an air tight seal Tighten all fittings securely to avoid the possibility of unfiltered air enter ing the engine CAUTION Never operate the engine with the air filter element removed This will allow unfil tered air to ente...

Page 123: ...are cool 1 Remove the bolt 1 Bolt 1 2 Start the engine and rev it up approxi mately twenty times while momen tarily creating exhaust system back pressure by blocking the end of the muffler with a shop towel 3 Stop the engine and allow the exhaust pipe to cool 4 Install the bolt and tighten it All manuals and user guides at all guides com ...

Page 124: ...n an enclosed area Make sure there are no combustible ma terials in the area EBU00296 Carburetor adjustment The carburetor is a vital part of the engine and requires very sophisticated adjust ment Most adjusting should be left to a Yamaha dealer who has the professional knowledge and experience to do so How ever the idling speed may be performed by the owner as a part of the usual mainte nance rou...

Page 125: ...lly rev the en gine to 4 000 to 5 000 r min The en gine is warm when it quickly responds to the throttle 2 Connect the tachometer and set the idle to the specified idling speed by adjusting the throttle stop screw Turn the screw in to increase engine speed and out to decrease engine speed Specified idle speed 1 450 1 550 r min 1 Throttle stop screw 1 All manuals and user guides at all guides com ...

Page 126: ...ould be left to a professional Yamaha service technician EBU00307 Throttle lever adjustment NOTE Adjust the engine idling speed before ad justing the throttle lever free play 1 Loosen the locknut 2 Turn the adjusting bolt until the throt tle lever free play is 3 5 mm 0 12 0 20 in 3 Tighten the locknut 1 Locknut 2 Adjusting bolt a 3 5 mm 0 12 in 0 20 in 1 2 a All manuals and user guides at all guid...

Page 127: ... limit 1mm 0 04 in EBU00313 Rear brake shoe inspection A wear indicator is provided on the rear brake This indicator allows checking of brake shoe wear without disassembling the brake Apply the rear brake and check the posi tion of the indicator If the indicator reach es the wear limit line ask a Yamaha dealer to replace shoes as a set 1 Wear indicator 2 Wear limit All manuals and user guides at a...

Page 128: ...Use only the designated quality brake fluid Otherwise the rubber seals may deteriorate causing leakage and poor brake performance NOTE If DOT 4 is not available DOT 3 can be used Recommended brake fluid DOT 4 1 Minimum level mark LOWER 3 Refill with the same type of brake flu id Mixing fluids may result in a harm ful chemical reaction and lead to poor brake performance 4 Be careful that water does...

Page 129: ... goes down EBU00316 Brake fluid replacement 1 Complete fluid replacement should be done only by trained Yamaha service personnel 2 Have a Yamaha dealer replace the fol lowing components during periodic maintenance or when they are dam aged or leaking a Replace all rubber seals every two years b Replace all hoses every four years All manuals and user guides at all guides com ...

Page 130: ...THE HAZARD After servicing Make sure the brakes operate smoothly and that the free play is cor rect Make sure the brakes do not drag Make sure the brakes are not spongy All air must be bled from the brake system Replacement of brake components re quires professional knowledge These procedures should be performed by a Yamaha dealer All manuals and user guides at all guides com ...

Page 131: ...nt a Fully loosen the adjusting nut on the brake cable 1 Adjusting nut brake cable 2 Adjusting nut brake rod b Turn the adjusting nut on the brake rod until free play is 20 30 mm 0 8 1 18 in a 20 30 mm 0 8 1 18 in a All manuals and user guides at all guides com a l l g u i d e s c o m ...

Page 132: ...rn in the adjusting bolt at the brake lever 1 Locknut 2 Adjusting bolt b Screw in the adjusting nut on brake cable to provide a gap of 0 1 mm 0 0 04 in between the lever and the pin 1 Adjusting nut brake cable a 0 1 mm 0 0 04 in All manuals and user guides at all guides com ...

Page 133: ...serviced or adjusted brakes WHAT CAN HAPPEN You could lose braking ability which could lead to an accident HOW TO AVOID THE HAZARD After servicing Make sure the brakes operate smoothly and that the free play is cor rect Make sure the brakes do not drag Replacement of brake components re quires professional knowledge These procedures should be performed by a Yamaha dealer All manuals and user guide...

Page 134: ... is felt Then turn it 1 8 turn clockwise 1 Locknut 2 Adjusting bolt 3 Tighten the locknut to specification NOTE Turn the adjusting bolt counterclockwise to decrease the clutch free play and turn it clockwise to increase the free play Tightening torque 15 Nm 1 5 m kg 11 ft lb All manuals and user guides at all guides com ...

Page 135: ...r injury HOW TO AVOID THE HAZARD Inspect cables frequently Replace dam aged cables Lubricate the inner cables and the cable ends If the cables do not operate smooth ly ask a Yamaha dealer to replace them EBU00362 Brake and shift pedals brake lever lubrication Lubricate the pivoting parts of each lever and pedal Recommended lubricant Yamaha chain and cable lube or SAE 10W30 motor oil Recommended lu...

Page 136: ... wheel 3 Remove the wheel assembly EBU00376 Wheel installation When installing the wheel reverse the re moval procedure Pay attention to the fol lowing NOTE The arrow mark on the tire must point toward the rotating direction of the wheel 1 Arrow mark All manuals and user guides at all guides com a l l g u i d e s c o m ...

Page 137: ...it is not necessary to check the electrolyte or add distilled wa ter in the battery If the battery seems to have discharged consult a Yamaha dealer CAUTION Do not try to remove the sealing caps of the battery cells You may damage the battery WARNING POTENTIAL HAZARD Failure to handle batteries or battery electrolyte carefully WHAT CAN HAPPEN You could be poisoned You could be severely burned by th...

Page 138: ... flames cig arettes or other sources of ignition Ventilate when charging or using in a closed space EBU00385 Battery maintenance 1 When the machine is not used for a month or longer remove the battery and store it in a cool dark place Com pletely recharge the battery before re installation CAUTION A special battery charger constant volt age ampere or constant voltage is re quired for recharging a ...

Page 139: ... Then turn on the switches If the fuse immediately blows again consult a Yamaha dealer Specified fuse Main fuse 30 A Headlight fuse 15 A Ignition system fuse 10 A Auxiliary DC jack fuse 10 A Carburetor warmer fuse 10 A 1 Main fuse 2 Spare fuse 1 Headlight fuse 2 Ignition fuse 3 Auxiliary DC jack fuse 4 Carburetor warmer fuse 5 Spare fuse 1 2 All manuals and user guides at all guides com ...

Page 140: ... WARNING POTENTIAL HAZARD Using an improper fuse WHAT CAN HAPPEN An improper fuse can cause damage to the electrical system which could lead to a fire HOW TO AVOID THE HAZARD Always use a fuse of the specified rat ing Never use a material in place of the proper fuse All manuals and user guides at all guides com ...

Page 141: ... the mount screws 2 Disconnect the coupler 3 Remove the light unit assembly from the headlight assembly by removing the screw 4 Remove the bulb holder cover 5 Turn the bulb holder counterclockwise and remove the defective bulb 1 Cover 2 Coupler 1 2 1 Screw 3 1 Bulb holder 1 2 1 All manuals and user guides at all guides com a l l g u i d e s c o m ...

Page 142: ...ARNING POTENTIAL HAZARD The headlight bulb is hot when it is on and immediately after it is turned off WHAT CAN HAPPEN You can be burned or a fire could start if the bulb touches something flammable HOW TO AVOID THE HAZARD Wait for the bulb to cool before touch ing or removing it 8 Install the headlight assembly and connect the coupler 9 Adjust the headlight beam Refer to page 8 35 All manuals and...

Page 143: ...ny problem in the fuel compression or ignition systems can cause poor starting and loss of power The troubleshooting chart describes a quick easy procedure for making checks If your machine requires any repair take it to a Yamaha dealer The skilled technicians at a Yamaha dealer ship have the tools experience and know how to properly service your machine Use only genuine Yamaha parts on your ma ch...

Page 144: ... HAPPEN Fuel can ignite or explode causing se vere injury or property damage HOW TO AVOID THE HAZARD Do not smoke when checking the fuel system Make sure there are no open flames or sparks in the area including pilot lights from water heaters or fur naces All manuals and user guides at all guides com ...

Page 145: ...is compression Compression normal No compression Ask a Yamaha dealer to inspect 3 Ignition Remove plug and check electrode Wet Wipe clean with dry cloth Dry Attach plug cap and ground to chassis Use the electric starter Spark good Ignition system normal Spark weak Adjust plug gap or replace plug No spark Ask a Yamaha dealer to inspect 4 Battery Use the electric starter Engine turns over quickly Ba...

Page 146: ...the dirt and degreaser off with a garden hose Use only enough pres sure to do the job CAUTION Excessive water pressure may cause wa ter seepage and deterioration of wheel bearings brakes transmission seals and electrical devices Many expensive repair bills have resulted from improper high pressure detergent applications such as those available in coin operated car wash ers 4 Once the majority of t...

Page 147: ... which may mar the paint or protective finish When finished start the engine and let it idle for several minutes WARNING POTENTIAL HAZARD Operation with wet brakes after wash ing WHAT CAN HAPPEN Wet brakes may have reduced stopping ability increasing the chance of an acci dent HOW TO AVOID THE HAZARD Test the brakes after washing Apply the brakes several times at slow speeds to let friction dry ou...

Page 148: ...ied amount 1 oz of stabilizer to each gallon of fuel or 7 5 cc of stabilizer to each liter of fuel 2 Remove the spark plug pour about one tablespoon of SAE 10W30 or 20W40 motor oil in the spark plug hole and reinstall the spark plug Ground the spark plug wire and turn the en gine over several times to coat the cyl inder wall with oil 3 Lubricate all control cables 4 Block up the frame to raise all...

Page 149: ...n a dry place and recharge it once a month Do not store the battery in an excessively warm or cold place less than 0 C 30 F or more than 30 C 90 F NOTE Make any necessary repairs before storing the machine All manuals and user guides at all guides com ...

Page 150: ...5 mm 33 7 in 1 230 mm 48 4 in 245 mm 9 65 in 3 000 mm 118 1 in Basic weight With oil and full fuel tank 252 kg 556 lb Engine Engine type Cylinder arrangement Displacement Bore Stroke Compression ratio Starting system Lubrication system Air cooled 4 stroke SOHC Single cylinder Forward inclined 386 cm3 83 0 71 5 mm 3 27 2 82 in 8 6 1 Electric starter and recoil starter Wet sump All manuals and user ...

Page 151: ... oil 0 23 L 0 20 lmp qt 0 24 US qt 0 25 L 0 22 lmp qt 0 26 US qt Air filter Dry type element Fuel Type Tank capacity Reserve amount UNLEADED FUEL 15 L 3 3 Imp gal 4 0 US gal 4 0 L 0 9 Imp gal 1 1 US gal Carburetor Type Manufacturer BSR33 MIKUNI Spark plug Type Manufacturer Gap DR8EA NGK 0 6 0 7 mm 0 024 0 028 in Clutch type Wet centrifugal automatic MODEL YFM400N 10 10 10 10 10 10 10 10 10 10 10 1...

Page 152: ...esh 5 speed forward 1 speed reverse Left foot operation 40 12 3 333 34 18 1 889 30 22 1 364 25 26 0 961 19 27 0 703 22 17 35 15 3 020 Chassis Frame type Caster angle Trail Steel tube 4 21 mm 0 83 in Tire Type Size Front Size Rear Tubeless AT25 8 12 AT25 11 10 Brake Front brake type Operation Rear brake type Operation Single disk brake Right hand operation Drum brake Left hand and right foot operat...

Page 153: ...l 150 mm 5 91 in 150 mm 5 91 in Electrical Ignition system Generator system Battery type voltage capacity C D I A C magneto YTX20L BS 12V 18AH Headlight type Krypton bulb Bulb voltage wattage quantity Headlight Taillight Indicator light Neutral Reverse Oil temparature 12V 30W 30W 2 12V 7 5W 1 12V 3 4W 1 12V 3 4W 1 12V 3 4W 1 MODEL YFM400N All manuals and user guides at all guides com ...

Page 154: ...urpose of noise control prior to its sale or delivery to the ultimate purchaser or while it is in use or 2 the use of the vehicle after such device or element of design has been removed or ren dered inoperative by any person AMONG THOSE ACTS PRESUMED TO CONSTITUTE TAMPERING ARE THE ACTS LIST ED BELOW These acts include tampering with the following systems i e modification removal etc Exhaust syste...

Page 155: ...rinted only as a reminder to you that the maintenance work is required It is not acceptable proof of maintenance work MAINTENANCE INTERVAL DATE OF SERVICE MILEAGE SERVICING DEALER NAME AND ADDRESS REMARKS 1 Month 3 Months 6 Months 12 Months 18 Months 24 Months 30 Months 36 Months 42 Months 48 Months 54 Months 60 Months 12 12 12 12 12 12 12 12 12 12 11 12 12 12 All manuals and user guides at all gu...

Page 156: ...on or racing use b Installation of parts or accessories that are not qualitatively equivalent to genuine Yamaha parts c Abnormal strain neglect or abuse d Lack of proper maintenance e Accident or collision damage f Modification to original parts g Damage due to improper transportation SPECIFIC EXCLUSIONS from this warranty shall include parts replaced due to normal wear or routine maintenance such...

Page 157: ...ach Yamaha ATV dealer is held responsible for his setup service and war ranty repair work Q Is the warranty transferable to second owners A Yes The remainder of the existing warranty can be transferred upon request The unit has to be inspected and re registered by an authorized Yamaha ATV dealer for the policy to remain effective CUSTOMER SERVICE If your machine requires warranty service you must ...

Page 158: ...the facts He can show you how easy it is to protect your investment with Yamaha Extended Service Keep your Yamaha protected even after your warranty expires with genuine Yamaha Extended Service Y E S Y E S is designed and administered by Yamaha Motor Corporation to provide maximum owner satisfaction You get uninterrupted factory backed coverage for extra peace of mind Y E S is flexible You choose ...

Page 159: ... Yamaha Limited Warranty expires You can also save money Y E S costs less within the first 90 days after you buy your Yamaha See your dealer today A special note If visiting your dealer isn t convenient contact Yamaha with your Primary ID number your frame number We ll be happy to help you get the Y E S coverage you need Yamaha Service Marketing P O Box 6555 Cypress CA 90630 All manuals and user g...

Page 160: ...E 14 3 EBU00436 WARNING Indicates a potential hazard that could result in serious injury or death All manuals and user guides at all guides com ...

Page 161: ...E 14 5 EBU00437 All manuals and user guides at all guides com a l l g u i d e s c o m ...

Page 162: ...USE AN APPROVED HELMET AND PROTECTIVE GEAR NEVER USE ON PUBLIC ROADS NEVER CARRY PASSENGERS NEVER operate without proper training or instruction at speeds too fast for your skills or the conditions on public roads a collision can occur with another vehicle with a passenger passengers affect balance and steering and increase risk of losing control LOCATE AND READ OWNER S MANUAL FOLLOW ALL INSTRUCTI...

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