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Yamaha DT125R 2004, Owner'S Manual

The Yamaha DT125R 2004 Owner's Manual is a comprehensive guide to operating and maintaining your motorcycle. Easily download this manual for free from our website, granting you access to valuable information about your bike's features, troubleshooting tips, and general maintenance procedures.

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SAFETY INFORMATION

.....................1-1

DESCRIPTION

.....................................2-1

Left view ...........................................2-1
Right view .........................................2-2
Controls and instruments .................2-3

INSTRUMENTS AND CONTROL
FUNCTIONS

........................................3-1

Main switch/steering lock.................3-1
Indicator and warning lights .............3-2
Speedometer unit .............................3-3
Handlebar switches ..........................3-3
Clutch lever.......................................3-4
Shift pedal.........................................3-4
Brake lever........................................3-5
Brake pedal.......................................3-5
Fuel tank cap ....................................3-5
Catalytic converter............................3-6
2-stroke engine oil ............................3-7
Fuel cock ..........................................3-7
Starter (choke) lever..........................3-8
Seat...................................................3-8
Shock absorber ................................3-9
YEIS handling precautions ...............3-9
YPVS.................................................3-9
Sidestand........................................3-10
Ignition circuit cut-off system .........3-10

PRE-OPERATION CHECKS

...............4-1

Pre-operation check list....................4-2

OPERATION AND IMPORTANT RIDING
POINTS

................................................5-1

Starting a cold engine ......................5-1
Starting a warm engine ....................5-2
Shifting..............................................5-2
Engine break-in.................................5-2
Parking..............................................5-3

PERIODIC MAINTENANCE AND
MINOR REPAIR

...................................6-1

Owner’s tool kit.................................6-1
Periodic maintenance and 

lubrication chart ............................6-2

Removing and installing cowlings 

and panels.....................................6-5

Checking the spark plug ..................6-6
Transmission oil ................................6-7
Coolant .............................................6-8
Cleaning the air filter element 

and check hose...........................6-10

Ajusting the carburetor ...................6-11
Adjusting the engine idling 

speed...........................................6-12

Ajusting the throttle cable free 

play ..............................................6-12

Tires ................................................6-13
Spoke wheels .................................6-15
Adjusting the clutch lever free 

play ..............................................6-15

Adjusting the brake lever free 

play ..............................................6-16

Adjusting the brake pedal position 

and free play................................6-17

Adjusting the rear brake light 

switch ..........................................6-17

Checking the front and rear 

brake pads ..................................6-18

Changing the brake fluid ................6-19
Checking the drive chain slack ......6-19
Adjusting the drive chain slack.......6-20
Lubricating the drive chain .............6-20
Checking and lubricating the 

cables ..........................................6-21

Checking and lubricating the 

throttle grip and cable .................6-21

Adjusting the autolube pump .........6-21
Checking and lubricating the 

brake and shift pedals.................6-21

Checking and lubricating the 

breake and clutch levers .............6-21

Checking and lubricating the 

sidestand .....................................6-21

Checking the front fork...................6-22
Checking the steering.....................6-22
Checking the wheel bearings .........6-23
Replacing the fuse..........................6-24
Replacing the headlight bulb..........6-24
Replacing the tail/brake light 

bulb .............................................6-25

Replacing the turn signal light 

bulb .............................................6-26

Supporting the motorcycle .............6-26

TABLE OF CONTENTS

1D0-F8199-E2.qxd  20/9/04 11:32  Página 4

All manuals and user guides at all-guides.com

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Summary of Contents for DT125R 2004

Page 1: ...1D0 F8199 E2 DT125R DT125X OWNER S MANUAL 1D0 F8199 E2 qxd 20 9 04 11 32 Página 1 All manuals and user guides at all guides com a l l g u i d e s c o m ...

Page 2: ...1D0 F8199 E2 qxd 20 9 04 11 32 Página 2 All manuals and user guides at all guides com ...

Page 3: ...r DT125R X The owner s manual does not only instruct you in how to operate inspect and maintain your motorcycle but also in how to safe guard yourself and others from trouble and injury In addition the many tips given in this manual will help keep your motorcycle in the best possible condition If you have any further questions do not hesitate to contact your Yamaha dealer The Yamaha team wishes yo...

Page 4: ...ity Therefore while this manual contains the most current product information available at the time of printing there may be minor discrepancies between your motorcycle and this manual If you have any questions concerning this manual please consult your Yamaha dea ler EWA10030 s s WARNING PLEASE READ THIS MANUAL CAREFULLY AND COMPLETELY BEFORE OPERATING THIS MOTORCYCLE s s WARNING Failure to follo...

Page 5: ... MOTOR SPAIN S A 1st edition July 2004 All rights reserved Any reprinting or unauthorized use without the written permission of YAMAHA MOTOR SPAIN S A is expressly prohibited Printed in Spain 1D0 F8199 E2 qxd 20 9 04 11 32 Página 3 All manuals and user guides at all guides com ...

Page 6: ...ose 6 10 Ajusting the carburetor 6 11 Adjusting the engine idling speed 6 12 Ajusting the throttle cable free play 6 12 Tires 6 13 Spoke wheels 6 15 Adjusting the clutch lever free play 6 15 Adjusting the brake lever free play 6 16 Adjusting the brake pedal position and free play 6 17 Adjusting the rear brake light switch 6 17 Checking the front and rear brake pads 6 18 Changing the brake fluid 6 ...

Page 7: ...6 29 MOTORCYCLE CARE AND STORAGE 7 1 Care 7 1 Storage 7 3 SPECIFICATIONS 8 1 Specifications 8 1 CONSUMER INFORMATION 9 1 Identification numbers 9 1 TABLE OF CONTENTS 1D0 F8199 E2 qxd 20 9 04 11 32 Página 5 All manuals and user guides at all guides com ...

Page 8: ...g yourself conspicuous appears to be very effective in reducing the chance of this type of accident Therefore Wear a brightly colored jacket Use extra caution when appro aching and passing through intersections since intersec tions are the most likely places for motorcycle accidents to occur Ride where other motorists can see you Avoid riding in anot her motorist s blind spot Many accidents involv...

Page 9: ... factor in the prevention or reduction of head injuries Always wear an approved hel met Wear a face shield or goggles Wind in your unprotected eyes could contribute to an impair ment of vision that could delay seeing a hazard The use of a jacket heavy boots trousers gloves etc is effective in preventing or reducing abra sions or lacerations Never wear loose fitting clothes otherwise they could cat...

Page 10: ...to the handlebar front fork or front fender These items including such cargo as sleeping bags duffel bags or tents can create unstable handling or a slow steering response Accessories Genuine Yamaha accessories have been specifically designed for use on this motorcycle Since Yamaha can not test all other accessories that may be available you must personally be responsible for the proper selection ...

Page 11: ... and may cause loss of consciousness and death within a short time Always operate your motorcycle in an area that has adequate ventilation Always turn the engine off before leaving the motorcycle unatten ded and remove the key from the main switch When parking the motorcycle note the following The engine and exhaust sys tem may be hot therefore park the motorcycle in a place where pedestrians or c...

Page 12: ...age 6 24 2 Radiator cover page 6 5 3 Fuel cock page 3 7 4 Air filter page 6 10 5 Choke lever page 3 8 6 Shift pedal page 3 4 7 Y E I S page 3 9 8 Y P V S page 3 9 9 Oil tank page 3 7 1D0 F8199 E2 qxd 20 9 04 11 32 Página 12 All manuals and user guides at all guides com ...

Page 13: ...t view DESCRIPTION 2 2 13 11 12 14 11 Tool kit page 6 1 12 Fuse page 6 24 13 Coolant tank page 6 8 14 Rear brake pedal page 3 5 1D0 F8199 E2 qxd 20 9 04 11 32 Página 13 All manuals and user guides at all guides com ...

Page 14: ... Left handlevar swicht page 3 3 18 Speedometer Page 3 3 19 Coolant temperature warning lamp page 3 3 20 Indicators page 3 2 21 Right handlevar swicht page 3 3 22 Front brake lever page 3 5 23 Throttle grip page 6 12 24 Fuel tank cap page 3 5 25 Main Switch page 3 1 25 24 1D0 F8199 E2 qxd 20 9 04 11 32 Página 14 All manuals and user guides at all guides com ...

Page 15: ...ved EAU10680 LOCK The steering is locked and all electri cal systems are off The key can be removed To lock the steering 1 Turn the handlebars all the way to the left 2 Push the key in from the OFF position and then turn it to LOCK while still pushing it 3 Remove the key To unlock the steering Push the key in and then turn it to OFF while still pushing it EWA10060 s s WARNING Never turn the key to...

Page 16: ...diately and fill the oil tank with Yamalube 2 or equivalent 2 stroke engine oil of either JASO grade FC or ISO grades EG C or EG D The warning light should go off after the 2 stroke engine oil tank has been refilled NOTE If the warning light does not come on when the key is in the ON position or does not go off after the 2 stroke engine oil tank has been refilled have a Yamaha dealer check the ele...

Page 17: ...bar switches 1 Dimmer switch j k 2 Horn switch a 3 Turn signal switch c d 4 Hazard switch EAU12400 Dimmer switch j k Set this switch to j for the high beam and to k for the low beam EAU12460 Turn signal switch c d To signal a right hand turn push this switch to d To signal a left hand turn push this switch to c When released the switch returns to the center position To cancel the turn signal light...

Page 18: ...attery may discharge EAU12820 Clutch lever 1 Clutch lever The clutch lever is located at the left handlebar grip To disengage the clutch pull the lever toward the hand lebar grip To engage the clutch rele ase the lever The lever should be pulled rapidly and released slowly for smooth clutch operation The clutch lever is equipped with a clutch switch which is part of the ignition circuit cut off sy...

Page 19: ...emove the fuel tank cap 1 Insert the key into the lock and turn it 1 4 turn counterclockwise 2 Turn the fuel tank cap 1 3 turn counterclockwise and pull it off 1 Fuel tank cap 2 Unlock 3 Open To install the fuel tank cap 1 Insert the fuel tank cap into the tank opening with the key inser ted in the lock and then turn the cap 1 3 turn clockwise 2 Turn the key 1 4 turn clockwise and then remove it I...

Page 20: ...mended fuel REGULAR UNLEADED GASOLINE ONLY Fuel tank capacity 10 7 L 2 82 US gal 2 35 Imp gal Fuel reserve amount 1 8 L 0 48 US gal 0 40 Imp gal ECA11400 CAUTION Use only unleaded gasoline The use of leaded gasoline will cause severe damage to internal engine parts such as the valves and piston rings as well as to the exhaust sys tem Your Yamaha engine has been desig ned to use regular unleaded ga...

Page 21: ...t the 2 stroke engine oil tank cap is properly installed Recommended oil Yamalube 2 or equivalent 2 stroke engine oil JASO grade FC or ISO grades EG C or EG D Oil quantity 1 3 L 1 37 US qt 0 29 Imp qt EAU13560 Fuel cock The fuel cock supplies fuel from the tank to the carburetor while filtering it also The fuel cock has three positions OFF 1 Arrow mark With the lever in this position fuel will not...

Page 22: ...irection a to turn on the starter choke Move the lever in direction b to turn off the starter choke EAU13960 Seat To remove the seat Remove the bolts and then pull the seat off 1 Bolt x2 To install the seat 1 Insert the projections on the front of the seat into the seat holders as shown 2 Place the seat in the original position and then tighten the bolts NOTE Make sure that the seat is properly se...

Page 23: ...installation of or damage to any part of the YEIS Yamaha Energy Induction System will result in poor performance Therefore handle the YEIS air chamber and air chamber hose with special care and immedia tely replace any cracked or damaged parts ECA10140 CAUTION Do not attempt to modify the YEIS in any way EAU15260 YPVS 1 YPVS This model is equipped with the YPVS Yamaha Power Valve System This syste...

Page 24: ...act the ground and distract the operator resulting in a possible loss of control Yama ha s ignition circuit cut off system has been designed to assist the operator in fulfilling the responsibi lity of raising the sidestand before starting off Therefore check this system regularly as described below and have a Yamaha dealer repair it if it does not function pro perly EAU15311 Ignition circuit cut o...

Page 25: ...engine stall After the engine has stalled 10 Move the sidestand up 11 Keep the clutch lever pulled 12 Push the start switch Does the engine start The system is OK The motorcycle can be ridden This check is most reliable if performed with a warmed up engine The neutral switch may be defective The motorcycle should not be ridden until checked by a Yamaha dealer The sidestand switch may be defective ...

Page 26: ...rough visual inspection to check the follo wing points before each ride NOTE Pre operation checks should be made each time the vehicle is used Such an inspection can be accom plished in a very short time and the added safety it assures is more than worth the time involved EWA11150 s s WARNING If any item in the Pre operation check list is not working properly have it inspected and repaired before ...

Page 27: ...ont brake Check brake pads for wear 6 16 6 18 Replace if necessary Check fluid level in reservoir If necessary add recommended brake fluid to specified level Check hydraulic system for leakage Check operation If soft or spongy have Yamaha dealer bleed hydraulic system Rear brake Check brake pads for wear 6 16 6 18 Replace if necessary Check fluid level in reservoir If necessary add recommended bra...

Page 28: ...ers Make sure that operation is smooth 6 21 Lubricate lever pivoting points if necessary Sidestand Make sure that operation is smooth 6 21 Lubricate pivot if necessary Chassis fasteners Make sure that all nuts bolts and screws are properly tightened Tighten if necessary Instruments lights Check operation signals and switches Correct if necessary Engine stop switch Check operation 3 3 Sidestand swi...

Page 29: ...RNING Before starting the engine check the function of the igni tion circuit cut off system according to the procedure described on page 3 11 Never ride with the sidestand down 1 Turn the fuel cock lever to ON 2 Turn the key to ON and make sure that the engine stop switch is set to f 3 Shift the transmission into the neutral position NOTE When the transmission is in the neu tral position the neutr...

Page 30: ...otorcycle for long distances The transmission is properly lubricated only when the engine is running Inade quate lubrication may damage the transmission Always use the clutch while changing gears to avoid dama ging the engine transmission and drive train which are not designed to withstand the shock of forced shifting EAU16830 Engine break in There is never a more important period in the life of y...

Page 31: ... speed occasio nally ECA10270 CAUTION If any engine trouble should occur during the engine break in period immediately have a Yamaha dealer check the vehicle EAU17180 Parking When parking stop the engine remo ve the key from the main switch and then turn the fuel cock lever to OFF EWA10310 s s WARNING Since the engine and exhaust system can become very hot park in a place where pedes trians or chi...

Page 32: ...nance work have a Yamaha dealer do it for you EAU17320 Owner s tool kit 1 Tool kit The service information included in this manual and the tools provided in the owner s tool kit are intended to assist you in the performance of pre ventive maintenance and minor repairs However additional tools such as a torque wrench may be necessary to perform certain mainte nance work correctly NOTE If you do not...

Page 33: ...ITEM CHECK OR MAINTENANCE JOB 1 6 12 18 24 1 Fuel line Check fuel hoses for cracks or damage 2 Spark plug Replace 3 Air filter element Clean Replace 4 Clutch Check operation Adjust 5 Front brake Check operation fluid level and vehicle for fluid leakage Replace brake pads Whenever worn to the limit 6 Rear brake Check operation fluid level and vehicle for fluid leakage Replace brake pads Whenever wo...

Page 34: ...ings Check bearing play and steering for roughness Lubricate with lithium soap based grease Every 50000 km 14 Chassis fasteners Make sure that all nuts bolts and screws are properly tightened 15 Sidestand Check operation Lubricate 16 Sidestand switch Check operation 17 Front fork Check operation and for oil leakage 18 Shock absorber assembly Check operation and shock absorber for oil leakage Rear ...

Page 35: ...ng and cable 27 Muffler and exhaust pipe Check the screw clamp for looseness 28 Lights signals Check operation and switches Adjust headlight beam PERIODIC MAINTENANCE AND MINOR REPAIR 6 4 EAU18670 NOTE The air filter needs more frequent service if you are riding in unusually wet or dusty areas Hydraulic brake service Regularly check and if necessary correct the brake fluid level Every two years re...

Page 36: ...ove the cowling screws and then pull the cowling off as shown To install the cowling Place the cowling in the original posi tion and then install the screws EAU18980 Cowlings B and C To remove one of the cowlings Remove the cowling screws and then pull the cowling off as shown 1 Screws x3 To install the cowling Place the cowling in the original posi tion and then install the screws 1 Screws x3 6 P...

Page 37: ...ectrode of the spark plug should be a medium to light tan the ideal color when the vehicle is ridden normally If the spark plug shows a distinctly different color the engine could be defective Do not attempt to diagnose such problems yourself Instead have a Yamaha dealer check the vehicle If the spark plug shows signs of elec trode erosion and excessive carbon or other deposits it should be repla ...

Page 38: ...n an upright posi tion NOTE Make sure that the vehicle is positio ned straight up when checking the oil level A slight tilt to the side can result in a false reading 1 Plug to fill with oil 2 Start the engine warm it up for several minutes and then turn it off 3 Wait a few minutes until the oil settles and then check the oil level through the check window located at the right side of the crankcase...

Page 39: ...transmis sion 6 Start the engine and then let it idle for several minutes while checking the transmission for oil leakage If oil is leaking imme diately turn off the engine and check for the cause EAU20070 Coolant The coolant level should be checked before each ride In addition the coo lant must be changed at the intervals specified in the periodic maintenance and lubrication chart EAU20170 To che...

Page 40: ...wise the effective ness of the coolant will be reduced EWA10380 s s WARNING Never attempt to remove the radia tor cap when the engine is hot 5 Install the panel NOTE If the engine overheats see page 6 31 for further instructions EAU20370 To change the coolant 1 Radiator cap bolt 2 Radiador cap 1 Put the vehicle on a level place 2 Remove cowling C and panel D See page 6 5 6 6 3 Remove the radiator ...

Page 41: ...oolant as soon as possi ble otherwise the effective ness of the coolant will be reduced 10 Install the radiator cap 11 Run the engine several minutes Stop the engine and recheck the coolant level in the radiator If it is low add more coolant until it rea ches the top of the radiator 12 Install the radiator cap stopper bolt 13 Fill the coolant reservoir with coolant up to maximum level 14 Install t...

Page 42: ...s may become excessively worn 8 Install the air filter case cover by installing the screws 9 Install the panel To clean the air filter check hose 1 Check the hose at the bottom of the air filter case for accumulated dirt or water 2 If dirt or water is visible remove the hose clean it and then install it EAU21280 Adjusting the carburetor The carburetor is an important part of the engine and require...

Page 43: ...w in direction b Engine idling speed 1250 1450 r min NOTE If the specified idling speed cannot be obtained as described above have a Yamaha dealer make the adjustment EAU21370 Adjusting the throttle cable free play a Free play The throttle cable free play should measure 3 5 mm 0 11 0 19 in at the throttle grip Periodically check the throttle cable free play and if neces sary adjust it as follows N...

Page 44: ... cm2 Rear 200 kPa 28 9 psi 2 kgf cm2 90 kg 198 lb to maximum load Front 180 kPa 26 1 psi 1 8 kgf cm2 Rear 200 kPa 28 9 psi 2 kgf cm2 Maximum load 180 kg 396 lb Total weight of rider passenger car go and accessories EWA11200 s s WARNING Because loading has an enormous impact on the handling braking performance and safety characte ristics of your vehicle you should keep the following precautions in ...

Page 45: ...be tires EWA10460 s s WARNING The front and rear tires should be of the same make and design otherwise the handling characteristics of the vehicle cannot be guaranteed After extensive tests only the tires listed below have been approved for this model by Yamaha Motor España S A DT125R Front tire Size 80 90 21 48P Manufacturer model MICHELIN T63 Rear tire Size 110 80 18 58P Manufacturer model MICHE...

Page 46: ...place the whe el Do not attempt even the sma llest repair to the wheel A defor med or cracked wheel must be replaced The wheel should be balanced whenever either the tire or wheel has been changed or replaced An unbalanced wheel can result in poor performance adverse handling characteristics and a shortened tire life Ride at moderate speeds after changing a tire since the tire sur face must first ...

Page 47: ...riodically check the brake lever free play and if necessary adjust it as follows 1 Loosen the locknut at the brake lever 2 To increase the brake lever free play turn the adjusting screw in direction a To decrease the bra ke lever free play turn the adjus ting screw in direction b 3 Tighten the locknut EWA10630 s s WARNING After adjusting the brake lever free play check the free play and make sure ...

Page 48: ...odically check the brake pedal free play and if necessary adjust it as follows To increase the brake pedal free play turn the adjusting nut at the brake rod in direction a To decrease the brake pedal free play turn the adjusting nut in direction b EWA10680 s s WARNING After adjusting the drive chain slack or removing and installing the rear wheel always check the brake pedal free play If proper ad...

Page 49: ... indicator EAU22580 Checking the brake fluid level 1 Minimum level mark Insufficient brake fluid may allow air to enter the brake system possibly causing it to become ineffective Before riding check that the brake fluid is above the minimum level mark and replenish if necessary A low bra ke fluid level may indicate worn brake pads and or brake system leakage If the brake fluid level is low be sure...

Page 50: ...lubrication chart In addi tion have the oil seals of the master cylinders and calipers as well as the brake hoses replaced at the intervals listed below or whenever they are damaged or leaking Oil seals Replace every two years Brake hoses Replace every four years EAU22770 To check the drive chain slack a Chain tension 1 Place the motorcycle on a level surface and hold it in an upright position NOT...

Page 51: ... the drive chain The drive chain must be cleaned and lubricated at the intervals specified in the periodic maintenance and lubrica tion chart otherwise it will quickly wear out especially when riding in dusty or wet areas Service the drive chain as follows ECA10581 CAUTION The drive chain must be lubricated after washing the motorcycle and riding in the rain 1 Clean the drive chain with kero sene ...

Page 52: ...hich must be adjusted by a Yamaha dealer at the intervals specified in the periodic maintenance and lubrication chart EAU23131 Checking and lubricating the brake and shift pedals The operation of the brake and shift pedals should be checked before each ride and the pedal pivots should be lubricated if necessary Recommended lubricant Lithium soap based grease all pur pose grease EAU23140 Checking a...

Page 53: ...nt brake push down hard on the handle bars several times to check if the front fork compresses and rebounds smoothly ECA10590 CAUTION If any damage is found or the front fork does not operate smoothly have a Yamaha dealer check or repair it EAU23280 Checking the steering Worn or loose steering bearings may cause danger Therefore the opera tion of the steering must be checked as follows at the inte...

Page 54: ...ses severe burns Avoid any con tact with skin eyes or clothing and always shield your eyes when working near batteries In case of contact administer the following FIRST AID EXTERNAL Flush with plenty of water INTERNAL Drink large quan tities of water or milk and immediately call a physician EYES Flush with water for 15 minutes and seek prompt medical attention Batteries produce explosive hydrogen ...

Page 55: ...our battery EAUS1180 Replacing the fuse 1 Fuse 2 Reserve fuse The fuse holder is located beside the battery case If the fuse is blown replace it as follows 1 Turn the key to OFF and turn off all electrical circuits 2 Remove the blown fuse and then install a new fuse of the specified amperage Specified fuse 15 A ECA10640 CAUTION Do not use a fuse of a higher ampe rage rating than recommended to avo...

Page 56: ... headlight bulb to keep it free from oil otherwise the transparency of the glass the luminosity of the bulb and the bulb life will be adver sely affected Thoroughly clean off any dirt and fingerprints on the headlight bulb using a cloth mois tened with alcohol or thinner 5 Install the bulb cover and then connect the coupler 6 Install the cowling 7 Have a Yamaha dealer adjust the headlight beam if ...

Page 57: ... motorcycle is in a stable and level position before starting any mainte nance A strong wooden box can be placed under the engine for added stability To service the front wheel 1 Stabilize the rear of the motorcy cle by using a motorcycle stand or if an additional motorcycle stand is not available by placing a jack under the frame in front of the rear wheel 2 Raise the front wheel off the ground b...

Page 58: ...hub so that the projections mesh with the slots 2 Lift the wheel up between the fork legs NOTE Make sure that there is enough space between the brake pads before inser ting the brake disc and that the slot in the speedometer gear unit fits over the retainer on the fork leg 3 Insert the wheel axle 4 Lower the front wheel so that it is on the ground 5 Tighten the wheel axle to the specified torque T...

Page 59: ...sen the axle nut 2 Lift the rear wheel off the ground according to the procedure on page 6 26 1 Axle nut 2 Chain tensioner 3 Remove the swingarm end bolts 4 Turn the drive chain adjusting plate on each side of the swin garm fully in direction a 5 Push the wheel forward and then remove the drive chain from the rear sprocket NOTE The drive chain does not need to be disassembled in order to remove an...

Page 60: ...ew cotter pin for the axle nut Tightening torque Axle nut 90 Nm 9 0 m kgf Swingarm end bolt 3 Nm 0 3 m kgf EAU25850 Troubleshooting Although Yamaha motorcycles recei ve a thorough inspection before ship ment from the factory trouble may occur during operation Any problem in the fuel compression or ignition systems for example can cause poor starting and loss of power The following troubleshooting ...

Page 61: ...n Have a Yamaha dealer check the vehicle Remove the spark plug and check the electrodes 3 Ignition Wipe off with a dry cloth and correct the spark plug gap or replace the spark plug Have a Yamaha dealer check the vehicle The engine does not start Have a Yamaha dealer check the vehicle The engine does not start Check the battery Operate the electric starter 4 Battery The engine turns over quickly T...

Page 62: ...k and repair the cooling system There is leakage There is no leakage Engine overheating EWA10400 s s WARNING Do not remove the radiator cap when the engine and radiator are hot Scalding hot fluid and steam may be blown out under pressure which could cause serious injury Be sure to wait until the engine has cooled After removing the radiator cap retaining bolt place a thick rag like a towel over th...

Page 63: ...irt do not leave the cleaner on the affected area any longer than instructed Also tho roughly rinse the area off with water immediately dry it and then apply a corrosion protec tion spray Improper cleaning can damage windshields cowlings panels and other plastic parts Use only a soft clean cloth or spon ge with mild detergent and water to clean plastic Do not use any harsh chemical products on pla...

Page 64: ...ickel plated surfa ces to prevent corrosion After cleaning 1 Dry the motorcycle with a cha mois or an absorbing cloth 2 Immediately dry the drive chain and lubricate it to prevent it from rusting 3 Use a chrome polish to shine chrome aluminum and stainless steel parts including the exhaust system Even the thermally indu ced discoloring of stainless steel exhaust systems can be removed through poli...

Page 65: ... chapter 2 For motorcycles equipped with a fuel cock that has an OFF posi tion Turn the fuel cock lever to OFF 3 Drain the carburetor float cham ber by loosening the drain bolt this will prevent fuel deposits from building up Pour the drai ned fuel into the fuel tank 4 Fill up the fuel tank and add fuel stabilizer if available to prevent the fuel tank from rusting and the fuel from deteriorating 5...

Page 66: ... every month in order to prevent the tires from becoming degra ded in one spot 8 Cover the muffler outlet with a plastic bag to prevent moisture from entering it 9 Remove the battery and fully charge it Store it in a cool dry place and charge it once a month Do not store the battery in an excessively cold or warm pla ce less than 0 C 30 F or more than 30 C 90 F For more information on storing the ...

Page 67: ... 3 L Transmission oil Type SAE10W30 type SE motor oil Oil change quantity 0 75 L Cooling system Coolant reservoir capacity up to the maxi mum leve 0 30 L Radiator capacity including all routes 0 92 L Air filter Air filter element Wet element Fuel Recommended fuel Regular unleaded gasoline only Fuel tank capacity 10 7 L Fuel reserve amount 1 8 L Carburetor Manufacturer MIKUNI Type x quantity TM28 9...

Page 68: ...t DT125RE 175 kPa DT125X 180 kPa Rear 200 kPa Off road riding Front DT125RE 150 kPa Rear DT125RE 175 kPa Front wheel Wheel type Spoke wheel Rim size DT125RE 21x1 60 DT125X 17x3 00 Rear wheel Wheel type Spoke wheel Rim size DT125RE 18x1 85 DT125X 17x3 50 Front brake Type Single disc brake Operation Right hand operation Recommended fluid DOT 4 Rear brake Type Single disc brake Operation Right foot o...

Page 69: ...ont turn signal light 12 V 10 0 W x 2 Rear turn signal light 12 V 10 0 W x 2 Auxiliary light 12 V 5 0 W x 1 Meter lighting LED Neutral indicator light 12 V 3 0 W x 1 High beam indicator light 12 V 3 0 W x 1 Oil level warning light 12 V 3 0 W x 1 Turn signal indicator light 12 V 3 0 W x 1 Fuses Main fuse 15 0 A SPECIFICATIONS 8 3 1D0 F8199 E2 qxd 20 9 04 11 32 Página 69 All manuals and user guides ...

Page 70: ...number The key identification number is stamped into the key tag Record this number in the space provided and use it for reference when ordering a new key EAU26400 Vehicle identification number 1 Frame number The vehicle identification number is stamped into the steering head pipe Record this number in the space provided NOTE The vehicle identification number is used to identify your motorcycle an...

Page 71: ...The model label is affixed to the frame under the seat See page 3 8 Record the information on this label in the space provided This information will be needed when ordering spare parts from a Yamaha dealer CONSUMER INFORMATION 9 2 1 1 1D0 F8199 E2 qxd 20 9 04 11 32 Página 71 All manuals and user guides at all guides com a l l g u i d e s c o m ...

Page 72: ... check hose 6 10 Clutch lever 3 4 Controls and instruments 2 3 Coolant 6 8 D 2 stroke engine oil 3 7 E Engine break in 5 2 F Front wheel 6 26 Fuel cock 3 7 Fuel tank cap 3 5 H Handlebar switches 3 3 I Identification numbers 9 1 Ignition circuit cut off system 3 10 Indicator and warning lights 3 2 L Left view 2 1 Lubricating the drive chain 6 20 M Main switch steering lock 3 1 O Owner s tool kit 6 ...

Page 73: ...1D0 F8199 E2 qxd 20 9 04 11 32 Página 73 All manuals and user guides at all guides com ...

Page 74: ...YAMAHA MOTOR ESPAÑA S A PRINTED IN SPAIN 2004 07 Bengar Gràfiques S L E 1D0 F8199 E2 qxd 20 9 04 11 32 Página 74 All manuals and user guides at all guides com ...

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