Honda CRF125F 2021 Owner'S Manual Download Page 79

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1. Place a drain pan under the crankcase.
2. To drain the oil, remove the oil fill cap/

dipstick, oil drain bolt (1), and sealing
washer (2).

3. Install the oil drain bolt with a new

sealing washer.
Oil drain bolt torque:

24 N·m (2.4 kgf·m, 18 lbf·ft)

4. Fill the crankcase with the

recommended grade oil; approximately:

0.85 (0.90 US qt, 0.75 Imp qt)

(1) Oil drain bolt

(2) Sealing washer

(1)

(2)

37K28B31.book Page 69 Monday, July 26, 2021 6:11 PM

Summary of Contents for CRF125F 2021

Page 1: ...Honda CRF125F FB OWNER S MANUAL USO E MANUTENZIONE MANUAL DEL PROPIETARIO Honda Motor Co Ltd 2021 37K28B31 book Page 1 Monday July 26 2021 6 11 PM ...

Page 2: ...R This motorcycle is designed and constructed as an operator only model The seating configuration does not safely permit the carrying of a passenger Never exceed the maximum weight capacity FOR OFF ROAD USE ONLY This motorcycle is designed and manufactured for off road use only PARENTS READ IMPORTANT MESSAGE ON PAGE 1 READ THIS OWNER S MANUAL CAREFULLY Pay special attention to the safety messages ...

Page 3: ...st production information available at the time of approval for printing Honda Motor Co Ltd reserves the right to make changes at any time without notice and without incurring any obligation No part of this publication may be reproduced without written permission 37K28B31 book Page 3 Monday July 26 2021 6 11 PM ...

Page 4: ...y outing and regular maintenance are essential To help meet the challenges safely and enjoy the adventure fully become thoroughly familiar with this Owner s Manual BEFORE YOU RIDE THE MOTORCYCLE As you read this manual you will find information that is preceded by a symbol This information is intended to help you avoid damage to your motorcycle other property or the environment Pleasant riding and...

Page 5: ...ecifications may vary with each locale The illustrations herein are based on the ED type This vehicle pictured in this owner s manual may not match your actual vehicle ED European direct sales U Australia New Zealand 37K28B31 book Page 5 Monday July 26 2021 6 11 PM ...

Page 6: ...formation alerts you to potential hazards that could hurt you or others Of course it is not practical or possible to warn you about all hazards associated with operating or maintaining a motorcycle You must use your own good judgment You will find important safety information in a variety of forms including Safety Labels on the motorcycle Safety Messages preceded by a safety alert symbol and one o...

Page 7: ...o use this motorcycle correctly and safely This entire manual is filled with important safety information please read it carefully You WILL be KILLED or SERIOUSLY HURT if you don t follow instructions You CAN be KILLED or SERIOUSLY HURT if you don t follow instructions You CAN be HURT if you don t follow instructions 37K28B31 book Page 7 Monday July 26 2021 6 11 PM ...

Page 8: ...UIPMENT 8 LOAD LIMITS AND GUIDELINES 12 LABELS 19 PARTS LOCATION 22 INDICATORS 24 MAJOR COMPONENTS Information you need to operate this motorcycle 24 BRAKES 28 CLUTCH 30 FUEL 33 ENGINE OIL 34 WHEELS TYRES page 39 ESSENTIAL INDIVIDUAL COMPONENTS 39 IGNITION SWITCH 40 START BUTTON 40 ENGINE STOP SWITCH 37K28B31 book Page 8 Monday July 26 2021 6 11 PM ...

Page 9: ...quired for operation 41 LEFT SIDE COVER 42 SEAT page 43 OPERATION 43 PRE RIDE INSPECTION 45 STARTING THE ENGINE 48 RUNNING IN 49 RIDING 51 BRAKING 52 PARKING 52 ANTI THEFT TIPS 37K28B31 book Page 9 Monday July 26 2021 6 11 PM ...

Page 10: ...ION 75 SPARK ARRESTER 76 DRIVE CHAIN 81 WHEEL RIMS AND SPOKES 82 WHEEL REMOVAL 86 BRAKE PADS WEAR 87 BRAKE SHOES WEAR 88 BATTERY 90 FUSE REPLACEMENT page 93 FRONT SUSPENSION 94 REAR SUSPENSION 95 SIDE STAND 96 CLEANING 99 TRANSPORTING 101 STORAGE GUIDE 101 STORAGE 103 REMOVAL FROM STORAGE 104 TAKING CARE OF THE UNEXPECTED 106 SPECIFICATIONS 110 MANUFACTURER AUTHORIZED REPRESENTATIVE AND IMPORTER 3...

Page 11: ...o hold the motorcycle up get on and comfortably sit on the seat with both feet touching the ground They should also be able to easily reach and work the brakes the throttle and all other controls ATHLETIC ABILITY is necessary for riding a motorcycle Generally speaking your youngster should be good at riding a bicycle before getting on a motorcycle Can your youngster judge speeds and distances on a...

Page 12: ...ty Remember learning to ride a motorcycle is a gradual step by step process It takes time patience and practice many hours over a period of weeks or months SUPERVISION is another important obligation of parents Even after youngsters have become skilled off road riders they should always ride with adult supervision It helps to regularly remind young riders of basic safety rules and cautions And rem...

Page 13: ...otect yourself when you ride You ll find many helpful recommendations throughout this manual Following are a few that we consider to be most important Always Wear a Helmet It s a proven fact helmets significantly reduce the number and severity of head injuries So always wear an approved motorcycle helmet We also recommend that you wear eye protection sturdy boots gloves and other protective gear p...

Page 14: ...kills is important to your safety and is a gradual step by step process You can start by practicing at low speeds in a safe area and slowly build your skills Getting personal instruction from an experienced rider or a qualified riding instructor can also be very valuable If you need assistance in locating a training course closest to you contact your dealer or the member organization of the Intern...

Page 15: ...your ability to make good judgements and ride safely Don t Drink and Ride Alcohol and riding don t mix Even one drink can reduce your ability to respond to changing conditions and your reaction time gets worse with every additional drink So don t drink and ride and don t let your friends drink and ride either Keep Your Bike in Safe Condition For safe riding it s important to inspect your motorcycl...

Page 16: ...bly and have a chin strap that can be tightened securely An open face helmet offers some protection but a full face helmet offers more Always wear a face shield or goggles to protect your eyes and help your vision Additional Riding Gear In addition to a helmet and eye protection we also recommend Sturdy off road motorcycle boots to help protect your feet ankles and lower legs Off road motorcycle g...

Page 17: ...own below keeping your hands on the handlebars and feet on the footpegs Helmet and Eye Protection Off road motorcycle gloves Riding trousers with Protector Off road motorcycle boots Long sleeved apparel and Protector 37K28B31 book Page 7 Monday July 26 2021 6 11 PM ...

Page 18: ...at change this motorcycle s design and performance can also make it unsafe Also the weight of any accessories will reduce the maximum load the motorcycle can carry The following pages give more specific information on loading accessories and modifications Loading How much weight you put on your motorcycle and how you load it are important to your safety If you decide to carry cargo you should be a...

Page 19: ... ride at reduced speeds and follow these common sense guidelines Keep cargo small and light Make sure it cannot easily be caught on brush or other objects and that it does not interfere with your ability to shift position to maintain balance and stability Place weight as close to the centre of the motorcycle as possible Do not attach large or heavy items such as a sleeping bag or tent to the handl...

Page 20: ...e for proper selection installation and use of non Honda accessories Check with your dealer for assistance and always follow these guidelines Make sure the accessory does not reduce ground clearance and lean angle limit suspension travel or steering travel alter your riding position or interfere with operating any controls Be sure electrical equipment does not exceed the motorcycle s electrical sy...

Page 21: ... handling stability and braking making it unsafe to ride Because safety vehicle movement and clearance must be taken into consideration you must consult your tyre maker or Honda dealer before changing your tyre model type Removing or modifying your exhaust system such as the spark arresters or mufflers or other equipment can also make your motorcycle illegal 37K28B31 book Page 11 Monday July 26 20...

Page 22: ...ious injury Others provide important safety information Read this information carefully and don t remove the labels If a label comes off or becomes hard to read contact your dealer for a replacement There is a specific symbol on each label The meanings of each symbol and label are as follows 37K28B31 book Page 12 Monday July 26 2021 6 11 PM ...

Page 23: ...o be serviced only by your dealer DANGER with RED background You WILL be KILLED or SERIOUSLY HURT if you don t follow instructions WARNING with ORANGE background You CAN be KILLED or SERIOUSLY HURT if you don t follow instructions CAUTION with YELLOW background You CAN be HURT if you don t follow instructions 37K28B31 book Page 13 Monday July 26 2021 6 11 PM ...

Page 24: ...a proper understanding of the hazards and correct handling procedures involved Handle battery electrolyte with extreme care as it contains dilute sulfuric acid Exposure to eyes or skin can cause burns or loss of eyesight Read this manual carefully and understand it before handling the battery Failure to do so can cause personal injury and damage to the vehicle Do not use the battery if the level o...

Page 25: ...le of their safety Operating this vehicle if you are under the age of 6 increases your chance of severe injury or death NEVER operate this vehicle if you are under age 6 For your protection always wear a helmet eye protection and protective gear while riding FUEL LABEL ED type only Unleaded petrol only ETHANOL up to 10 by volume DRIVE CHAIN LABEL Keep chain adjusted and lubricated 25 35 mm 1 0 1 4...

Page 26: ...heat CE MARK ED type only CRF125F Engine net power 6 7 kW Machine mass 88 kg CRF125FB Engine net power 6 7 kW Machine mass 90 kg UKCA MARK ED type only Some vehicles do not have UKCA mark CRF125F CRF125FB 37K28B31 book Page 16 Monday July 26 2021 6 11 PM ...

Page 27: ...17 USE CAUTION LABEL DRIVE CHAIN LABEL BATTERY LABEL REAR CUSHION LABEL 37K28B31 book Page 17 Monday July 26 2021 6 11 PM ...

Page 28: ...18 FUEL LABEL ED type only CE MARK ED type only CRF125F CRF125FB UKCA MARK ED type only 37K28B31 book Page 18 Monday July 26 2021 6 11 PM ...

Page 29: ...brake lever Throttle grip Start button Fuel fill cap Clutch lever Fuel reserve indicator front brake fluid reservoir Engine stop switch PGM FI malfunction indicator lamp MIL Ignition indicator 37K28B31 book Page 19 Monday July 26 2021 6 11 PM ...

Page 30: ...20 Engine oil drain bolt Footpeg Spark arrester Kickstarter Engine oil fill cap dipstick Spark plug Rear brake pedal 37K28B31 book Page 20 Monday July 26 2021 6 11 PM ...

Page 31: ...21 Drive chain Battery Main fuse Side stand Footpeg Shift lever Crankcase breather tube Air cleaner Front brake caliper Sub fuse 37K28B31 book Page 21 Monday July 26 2021 6 11 PM ...

Page 32: ...ipped to the locations as shown in the illustrations Their functions are described in the tables 1 PGM FI malfunction indicator lamp MIL 2 Ignition Indicator 1 2 3 Fuel reserve indicator 3 37K28B31 book Page 22 Monday July 26 2021 6 11 PM ...

Page 33: ...ke the motorcycle to your dealer as soon as possible 2 Ignition Indicator When the ignition switch is turned on the ignition indicator comes on If the indicator does not come on when it should have your dealer check for problems 3 Fuel reserve indicator When this indicator comes on while riding fuel reserved in the tank is about 0 7 0 18 US gal 0 15 Imp gal The indicator should also light for a fe...

Page 34: ...ake pads are not worn beyond the recommended limit page 86 there is probably air in the brake system and it must be bled See your dealer for this service Brake Fluid Level With the motorcycle in an upright position check the fluid level It should be above the LWR mark 1 If the level is at or below the LWR mark check the brake pads for wear page 86 Worn pads should be replaced If the pads are not w...

Page 35: ...e 4 Tighten the lock nut Return the dust cover to its normal position Lock nut torque 5 9 N m 0 6 kgf m 4 4 lbf ft 5 Apply the brake release it then spin the wheel and check that it rotates freely Repeat this procedure several times 6 Check freeplay by pulling in slowly on the front brake lever until the brake starts to engage Freeplay LESS THAN 20 mm 0 8 in If brake lever freeplay is not within t...

Page 36: ...djusting the Rear Brake Pedal Freeplay 1 Place the motorcycle on its side stand 2 Measure the distance the rear brake pedal 3 moves before the brake starts to take hold Freeplay should be 10 20 mm 0 4 0 8 in 3 If adjustment is necessary turn the rear brake adjusting nut 4 1 Stopper bolt 2 Lock nut 3 Rear brake pedal 1 3 2 4 Rear brake adjusting nut 5 Brake arm pin A Decrease freeplay B Increase fr...

Page 37: ...l is released If proper adjustment cannot be obtained by this method see your dealer After adjustment push the brake arm 6 to confirm that there is a gap between the rear brake adjusting nut and the brake arm pin After adjustment confirm the freeplay of the rear brake pedal Other Checks Make sure the brake rod brake arm spring and fasteners are in good condition 4 Rear brake adjusting nut 5 Brake ...

Page 38: ... back the rubber dust cover 2 2 Loosen the lock nut 3 and turn the clutch cable adjuster 4 Tighten the lock nut and check the adjustment 3 If the adjuster is threaded out near its limit or if the correct freeplay cannot be obtained loosen the lock nut and turn in the clutch cable adjuster completely Tighten the lock nut and install the rubber dust cover 1 Clutch lever 1 2 Rubber dust cover 3 Lock ...

Page 39: ...ver and open the throttle The motorcycle should begin to move smoothly and accelerate gradually If proper adjustment cannot be obtained or the clutch does not work correctly see your dealer Other Checks Check the clutch cable for kinks or signs of wear that could cause sticking or failure Lubricate the clutch cable with a commercially available cable lubricant to prevent premature wear and corrosi...

Page 40: ...er refuelling turn the fuel fill cap clockwise until it clicks Insert the breather tube into the steering stem nut Petrol is highly flammable and explosive You can be burned or seriously injured when handling fuel Stop the engine and keep heat sparks and flame away Refuel only outdoors Do not spill the petrol If you do wipe up the spills immediately 1 Fuel fill cap 2 Breather tube 3 Steering stem ...

Page 41: ...park knock or pinking persists consult your dealer Failure to do so is considered misuse and damage caused by misuse is not covered by Honda s Limited Warranty Occasionally you may experience light spark knock while operating under heavy loads This is no cause for concern it simply means your engine is operating efficiently 37K28B31 book Page 31 Monday July 26 2021 6 11 PM ...

Page 42: ... fuel tank Damage the rubber tubes of the fuel line Cause corrosion of the fuel tank Cause poor drivability Before buying fuel from an unfamiliar station try to find out if the fuel contains alcohol If it does confirm the type and percentage of alcohol used If you notice any undesirable operating symptoms while using a petrol that contains alcohol or one that you think contains alcohol switch to a...

Page 43: ...3 5 minutes 3 Stop the engine After 2 3 minutes remove the oil fill cap dipstick wipe it clean and reinsert the oil fill cap dipstick without screwing it in Remove the oil fill cap dipstick The oil level should be between the upper and lower level marks on the oil fill cap dipstick 4 If required add the specified oil see page 65 up to the upper level mark Do not overfill 5 Reinstall the oil fill c...

Page 44: ...e off road and size in good condition with adequate tread and correctly inflated It is important to properly replace parts according to the replacement schedule We recommend that you leave this work to the experts with the proper equipment and experience Wheels that are deformed or damaged must be replaced And when the tyre is punctured it is essential to stop as soon as possible and inspect the t...

Page 45: ...enerally underinflated tyres wear unevenly adversely affect handling and are more likely to fail from being overheated Underinflated tyres can also cause wheel damage in rocky terrain Overinflated tyres make your motorcycle ride harshly are more prone to damage from surface hazards and wear unevenly Make sure the valve stem caps are secure If necessary install new caps Using tyres that are excessi...

Page 46: ... tyre pressures you should also examine the tyre treads and sidewalls for wear damage and foreign objects Look for Bumps or bulges in the side of the tyre or the tread Replace the tyre if you find any bumps or bulges Cuts splits or cracks in the tyre Replace the tyre if you can see fabric or cord Excessive tread wear Also if you hit a pothole or hard object pull to the side of the road as soon as ...

Page 47: ...paired may not have the same reliability as a new one and it may fail while you are riding If you need to make a temporary repair by patching a tube or using an aerosol sealant ride cautiously at reduced speed and have the tube replaced before you ride again Any time a tube is replaced the tyre should be carefully inspected as described on page 36 Minimum tread depth Front 3 0 mm 0 12 in Rear 3 0 ...

Page 48: ...ommended wheels for your motorcycle are Front CRF125F 17 1 4 CRF125FB 19 1 4 Rear CRF125F 14 1 85 CRF125FB 16 1 85 Whenever you replace a tyre use one that is equivalent to the original and be sure the wheel is balanced after the new tyre is installed Also remember to replace the inner tube whenever you replace a tyre The old tube will probably be stretched and if installed in a new tyre it could ...

Page 49: ...e riding insert the key and turn it to the ON position After parking the motorcycle remove the key 1 Ignition switch 1 OFF ON ON OFF Key Position Function Key Removal OFF The engine cannot be operated Key can be removed ON With the engine stop switch at RUN and the transmission in neutral the engine can be started Key cannot be removed 37K28B31 book Page 39 Monday July 26 2021 6 11 PM ...

Page 50: ...SWITCH The engine stop switch 1 is next to the throttle grip When the switch is in the RUN position the engine will operate When the switch is in the STOP position the engine will not operate This switch is intended primarily as an emergency switch and should normally remain in the RUN position 1 Start button 1 1 Engine stop switch 1 37K28B31 book Page 40 Monday July 26 2021 6 11 PM ...

Page 51: ... 8 on the shroud Installation 1 Hook the tab 9 to the shroud and slide the top of the side cover under the bottom edge of the seat 2 Align the prong with the rubber grommet and also the boss with the hole on the shroud 3 Install the collar onto the bolt B 4 Install the bolt B and bolt A and tighten them securely 1 Left side cover 2 Bolt A 3 Bolt B 4 Collar 5 Prong 6 Grommet 7 Boss 8 Hole 9 Tab 4 3...

Page 52: ...eat backward Installation 1 Insert the front recess 4 into the front prong 5 and the rear prong 6 into the rear recess 7 2 Install the collars onto the bolts Tighten the bolts securely 1 Seat 2 Bolts 3 Collars 4 Front recess 5 Front prong 6 Rear prong 7 Rear recess 4 3 1 2 5 6 2 7 37K28B31 book Page 42 Monday July 26 2021 6 11 PM ...

Page 53: ...ion Front Make sure there is no brake fluid leakage page 24 Rear Adjust freeplay if necessary pages 26 27 Tyres check condition and pressure pages 34 37 Spokes and rim lock check and tighten if necessary page 81 Drive chain check condition and slack page 76 Adjust and lubricate if necessary Chain slider check slider wear page 77 Improperly maintaining this motorcycle or failing to correct a proble...

Page 54: ...3 Clutch check operation and adjust if necessary pages 28 29 Spark plug and high tension terminal check for looseness pages 71 72 Engine stop switch check for proper function page 40 Nuts bolts fasteners check the front and rear wheels to see that the axle nuts are tightened securely Check security of all other nuts bolts and fasteners 37K28B31 book Page 44 Monday July 26 2021 6 11 PM ...

Page 55: ...ot run the engine with the garage door closed Even with the door open run the engine only long enough to move your motorcycle out of the garage Do not use the electric starter for more than 5 seconds at a time Release the start button for approximately 10 seconds before pressing it again Preparation Before starting insert the key and turn the ignition switch to ON and confirm the following The tra...

Page 56: ... Then let the kickstarter return to the top of its stroke With the throttle completely closed operate the kickstarter starting from the top of the stroke kick through to the bottom with a rapid continuous motion Allowing the kickstarter to snap back freely against the pedal stop can damage the engine case 2 If you cannot start the engine open the throttle slightly about 3 mm 0 1 in without freepla...

Page 57: ...he kickstarter If the engine fails to start after repeated attempts it may be flooded with excess fuel To clear a flooded engine open the throttle fully and crank the engine several times with the kickstarter Follow the normal engine starting procedure page 46 Ignition Cut Off Your motorcycle is designed to automatically stop the engine and fuel pump if the motorcycle is over turned a banking sens...

Page 58: ... future reliability and performance by paying extra attention to how you ride during the first operating day or 25 km 15 miles During this period avoid full throttle starts and rapid acceleration 37K28B31 book Page 48 Monday July 26 2021 6 11 PM ...

Page 59: ...clutch lever and depress the shift lever to shift into 1st low gear 3 Slowly release the clutch lever and at the same time gradually increase engine speed by opening the throttle Coordination of the throttle and clutch lever will assure a smooth positive start 4 When the motorcycle attains a moderate speed close the throttle pull in the clutch lever and shift to 2nd gear by raising the shift lever...

Page 60: ...ar the rear wheel may lose traction resulting in a possible loss of vehicle control Do not shift gears without disengaging the clutch and closing the throttle The engine and drive train could be damaged by overspeed and shock Do not tow the motorcycle or coast for long distances while the engine is off The transmission will not be properly lubricated and damage may result Do not run the engine at ...

Page 61: ...e reduce speed or brake before entering a turn closing the throttle or braking in mid turn may cause wheel slip Wheel slip will reduce control of the motorcycle When riding in wet or rainy conditions or on loose surfaces the ability to maneuver and stop will be reduced All of your actions should be smooth under these conditions Rapid acceleration braking or turning may cause loss of control For yo...

Page 62: ...ity of rolling off the side stand or overturning ANTI THEFT TIPS 1 Be sure the registration information for your motorcycle is accurate and current 2 Park your motorcycle in a locked garage whenever possible 3 Use an additional anti theft device of good quality 4 Put your name address and phone number in this Owner s Manual and keep it on your motorcycle at all times Many times stolen motorcycles ...

Page 63: ... More frequent service is needed if you subject your motorcycle to severe use such as competition or ride in unusually wet or dusty areas Frequent servicing of the air cleaner is especially important to help you avoid a possible costly engine repair If your motorcycle overturns or becomes involved in a crash be sure your dealer inspects all major parts even if you are able to make some repairs MAI...

Page 64: ...an or other qualified mechanic instructions are included in this manual only to assist in emergency service Some of the most important safety precautions follow However we cannot warn you of every conceivable hazard that can arise in performing maintenance Only you can decide whether or not you should perform a given task Failure to properly follow maintenance instructions and precautions can caus...

Page 65: ...the motorcycle from falling over park it on a firm level surface using the side stand or a maintenance stand to provide support To reduce the possibility of a fire or explosion be careful when working around petrol Use only nonflammable solvent not petrol to clean parts Keep cigarettes sparks and flames away from all fuel related parts Remember that your dealer knows your motorcycle best and is fu...

Page 66: ... properly trained and equipped technicians Your dealer meets all of these requirements Should be serviced by your dealer unless the owner has proper tools and service data and is mechanically qualified Refer to the Official Honda Shop Manual In the interest of safety we recommend these items be serviced only by your dealer Honda recommends that your dealer should road test your motorcycle after ea...

Page 67: ...1 6 12 18 24 FUEL LINE I I FUEL FILTER Every 8 000 km 4 800 mi R THROTTLE OPERATION I I 73 AIR CLEANER NOTE 1 C C C C 61 CRANKCASE BREATHER I I I I 64 SPARK PLUG I I I I 71 VALVE CLEARANCE I I I I I ENGINE OIL R R R R R 65 ENGINE OIL STRAINER SCREEN C C ENGINE OIL CENTRIFUGAL FILTER C C ENGINE IDLE SPEED I I I I I 37K28B31 book Page 57 Monday July 26 2021 6 11 PM ...

Page 68: ...every 3 months I L 76 DRIVE CHAIN SLIDER I I I I 77 BRAKE FLUID NOTE 2 I I I I 24 BRAKE SHOES PADS WEAR I I I I 86 87 BRAKE SYSTEM I I I I I 25 86 87 CLUTCH SYSTEM I I I I I 28 SIDE STAND I I 95 SUSPENSION I I 93 94 SPARK ARRESTER Every 1 600 km 1 000 mi or every 100 operating hours C 75 NUTS BOLTS FASTENERS I I I WHEELS TYRES I I I I I 34 81 STEERING HEAD BEARINGS I I I 37K28B31 book Page 58 Mond...

Page 69: ...59 TOOL KIT The spark plug wrench 1 and its handle 2 are stored in the tool bag 3 1 Spark plug wrench 2 Handle 3 Tool bag 1 2 3 37K28B31 book Page 59 Monday July 26 2021 6 11 PM ...

Page 70: ...ring replacement parts Record the numbers here for your reference FRAME NO __________________________ The frame number 1 is stamped on the left side of the steering head The engine number 2 is stamped on the left side of the engine ENGINE NO _________________________ 1 Frame number 1 2 Engine number 2 37K28B31 book Page 60 Monday July 26 2021 6 11 PM ...

Page 71: ...eas 1 Remove the left side cover page 41 2 Unlatch the retainer clips 1 and remove the air cleaner housing cover 2 3 Unhook the set spring 3 take care to avoid bending the set spring and set spring holder 4 4 Remove the air cleaner 5 1 Retainer clips 2 Air cleaner housing cover 2 1 1 3 Set spring 4 Set spring holder 5 Air cleaner 5 4 3 37K28B31 book Page 61 Monday July 26 2021 6 11 PM ...

Page 72: ... or low flash point solvents for cleaning the air cleaner A fire or explosion could result 7 Soak the air cleaner in gear oil SAE 80 90 until saturated then squeeze out the excess oil 8 Assemble the air cleaner and holder Insert the tabs 7 in the air cleaner holes 8 5 Air cleaner 6 Air cleaner holder 7 Tabs 8 Holes 6 7 8 8 5 37K28B31 book Page 62 Monday July 26 2021 6 11 PM ...

Page 73: ...the cleaner into the upper hole 10 in the air cleaner housing and the lower tab 11 into the lower hole 12 Hook the set spring Check that the air cleaner is properly seated 12 Install the air cleaner housing cover and set the retainer clips 13 Install the left side cover page 41 9 Upper tab 10 Upper hole 11 Lower tab 12 Lower hole 12 11 9 10 37K28B31 book Page 63 Monday July 26 2021 6 11 PM ...

Page 74: ...overflows the air filter may become contaminated with engine oil causing poor engine performance 1 Place a suitable container under the crankcase breather tube 2 Remove the crankcase breather drain tube 1 3 Drain deposits into a suitable container 4 Install the crankcase breather drain tube 1 Crankcase breather drain tube 1 37K28B31 book Page 64 Monday July 26 2021 6 11 PM ...

Page 75: ... energy conserving or resource conserving service label on the container They may affect lubrication and clutch performance NOT RECOMMENDED RECOMMENDED Do not use non detergent vegetable or castor based racing oils A P I classification SJ or higher except oils labeled as energy conserving or resource conserving on the circular API service label Viscosity SAE 10W 30 JASO T 903 standard MA Suggested...

Page 76: ...d be based on average atmospheric temperature in your riding area The following provides a guide to the selection of the proper grade or viscosity of oil to be used at various atmospheric temperatures 37K28B31 book Page 66 Monday July 26 2021 6 11 PM ...

Page 77: ...s for 4 stroke motorcycle engines There are two classes MA and MB Oil conforming to the standard is labeled on the oil container For example the following label shows the MA classification 1 Oil code 2 Oil classification 1 2 37K28B31 book Page 67 Monday July 26 2021 6 11 PM ...

Page 78: ...n Used engine oil may cause skin cancer if repeatedly left in contact with the skin for prolonged periods Although this is unlikely unless you handle used oil on a daily basis it is still advisable to thoroughly wash your hands with soap and water as soon as possible after handling used oil Changing the oil requires a torque wrench If you do not have it and the necessary skill we recommend that yo...

Page 79: ...t 1 and sealing washer 2 3 Install the oil drain bolt with a new sealing washer Oil drain bolt torque 24 N m 2 4 kgf m 18 lbf ft 4 Fill the crankcase with the recommended grade oil approximately 0 85 0 90 US qt 0 75 Imp qt 1 Oil drain bolt 2 Sealing washer 1 2 37K28B31 book Page 69 Monday July 26 2021 6 11 PM ...

Page 80: ...er stopping the engine check that the oil level is at the upper level mark on the oil fill cap dipstick with the motorcycle upright on firm level ground Make sure there are no oil leaks Running the engine with insufficient oil can cause serious engine damage 37K28B31 book Page 70 Monday July 26 2021 6 11 PM ...

Page 81: ...d result 1 Disconnect the spark plug cap 2 Clean any dirt from around the spark plug base 3 Remove the spark plug using a spark plug wrench provided in the tool kit 4 Visually inspect the spark plug electrodes for wear The centre electrode should have square edges and the side electrode should not be eroded 5 Discard the spark plug if there is apparent wear or if the insulator is cracked or chippe...

Page 82: ...plug is good 1 8 turn after it seats If installing a new plug tighten it twice to prevent loosening a First tighten the plug 1 2 turn after it seats b Then loosen the plug c Next tighten the plug again 1 8 turn after it seats An improperly tightened spark plug can damage the engine If a plug is too loose a piston may be damaged If a plug is too tight the threads may be damaged 10 Reinstall the spa...

Page 83: ... full steering positions 2 Inspect the condition of the throttle cables 1 from the throttle grip down to the throttle body If the cable is kinked chafed or improperly routed it should be replaced and or rerouted 3 Lubricate the cable with a commercially available cable lubricant to prevent premature wear and corrosion 1 Throttle cables 1 37K28B31 book Page 73 Monday July 26 2021 6 11 PM ...

Page 84: ...ock nut 3 and turn the cable adjuster 3 After adjustment check again for smooth rotation of the throttle grip from the fully closed to the fully open position with the steering to the full right and left as well as straight ahead If proper throttle freeplay cannot achieved contact your dealer 1 Cable adjuster 2 Cable boot 3 Lock nut A Decrease freeplay B Increase freeplay 3 2 A B 1 37K28B31 book P...

Page 85: ...e bolts 1 the spark arrester 2 and the gasket 3 from the muffler 4 2 Use a brush to remove carbon deposits from the spark arrester screen 5 Be careful to avoid damaging the spark arrester screen The spark arrester must be free of breaks and holes Replace if necessary Check the gasket Replace if necessary 3 Install the spark arrester and a new gasket in the muffler and tighten the bolts to the spec...

Page 86: ...off place the motorcycle on its side stand and shift the transmission into neutral 2 Check slack in the lower drive chain run midway between the sprockets Drive chain slack should be adjusted to allow the following vertical movement by hand 25 35 mm 1 0 1 4 in 3 Roll the motorcycle forward Stop Check the drive chain slack Repeat this procedure several times Drive chain slack should remain constant...

Page 87: ... determine whether the chain is worn beyond its service limit Remove the drive chain and measure the distance between a span of pins from pin centre to pin centre If the distance exceeds the service limit the chain is worn out and should be replaced New Chain 508 mm 20 0 in Service Limit 518 mm 20 4 in Measure a span of 41 pins 2 Chain slider 3 Depth 2 3 3 3 37K28B31 book Page 77 Monday July 26 20...

Page 88: ...e chain requires adjustment the procedure is as follows 1 Place a support block under the engine to raise the rear wheel off the ground 2 Loosen the rear axle nut 1 3 Loosen the lock nuts 2 on both right and left chain adjusters Damaged Sprocket Teeth REPLACE Worn Sprocket Teeth REPLACE Normal Sprocket Teeth GOOD 1 Rear axle nut 2 Lock nut 3 Adjusting nut 4 Notch 5 Graduated scale 1 3 5 4 2 37K28B...

Page 89: ...he lock nuts by holding the adjusting nuts with a spanner 7 Recheck drive chain slack 8 Rear brake pedal freeplay is affected when repositioning the rear wheel to adjust drive chain slack Check rear brake pedal freeplay and adjust as necessary page 26 If a torque wrench is not used for this installation see your dealer as soon as possible to verify proper assembly Lubrication Lubricate every 500 k...

Page 90: ...ng the drive chain A fire or explosion could result 3 Inspect the sprocket teeth for possible wear or damage 4 Lubricate the drive chain page 79 5 Pass the chain over the sprockets and join the ends of the chain with the master link For ease of assembly hold the chain ends against adjacent rear sprocket teeth while inserting the master link The master link is the most critical part affecting the s...

Page 91: ...iceable see your dealer for inspection Maintenance of spoke tension and wheel trueness are critical to safe motorcycle operation During the first 150 km 100 miles spokes will loosen more rapidly due to initial seating of parts Excessively loose spokes may result in high speed instability and possible loss of control 1 Wheel rim 2 Spoke 3 Rim lock 3 1 2 37K28B31 book Page 81 Monday July 26 2021 6 1...

Page 92: ...emove the front axle shaft 2 wheel and side collars Do not depress the brake lever when the wheel is off the motorcycle The caliper pistons will be forced out of the cylinders with subsequent loss of brake fluid If this occurs servicing of the brake system will be necessary See your dealer for this service 1 Axle nut 2 Front axle shaft 2 1 37K28B31 book Page 82 Monday July 26 2021 6 11 PM ...

Page 93: ...to the specified torque Front axle nut torque 62 N m 6 3 kgf m 46 lbf ft 4 After installing the wheel apply the brake several times and then check if the wheel rotates freely Recheck the wheel if the brake drags or if the wheel does not rotate freely Check front brake adjustment page 25 If the torque wrench was not used for installation see your dealer as soon as possible to verify proper assembly...

Page 94: ... 2 from the brake arm 3 4 Loosen the lock nuts 4 and adjusting nuts 5 on the chain adjusters on both sides 5 Unscrew the axle nut 6 and pull out the axle shaft 7 Push the wheel forward and derail the drive chain from the rear sprocket Remove the wheel 1 Brake adjuster 2 Brake rod 3 Brake arm 4 Lock nut 5 Adjusting nut 6 Axle nut 7 Axle shaft 4 2 5 5 7 6 3 4 1 37K28B31 book Page 84 Monday July 26 2...

Page 95: ...t the drive chain pages 78 79 3 Adjust the rear brake page 26 4 Apply the brake several times and check for free wheel rotation after the brake pedal is released If a torque wrench is not used for installation see your dealer as soon as possible to verify proper assembly Improper assembly may lead to loss of braking capacity 1 Lug 2 Slot 2 1 37K28B31 book Page 85 Monday July 26 2021 6 11 PM ...

Page 96: ...enerally the pads will wear faster on wet and dirty roads Inspect the pads at each regular maintenance interval page 58 Front Brake Check the wear limit groove 1 in each pad If either pad is worn to the groove replace both pads as a set See your dealer for this service FRONT BRAKE 1 Wear limit grooves 1 37K28B31 book Page 86 Monday July 26 2021 6 11 PM ...

Page 97: ...reference mark 3 on the brake panel 4 If the arrow aligns with the reference mark on full application of the brake the brake shoes must be replaced See your dealer for this service When the brake service is necessary see your dealer Use only Honda Genuine Parts or its equivalent REAR BRAKE 1 Arrow 2 Brake arm 3 Reference mark 4 Brake panel 1 3 2 4 37K28B31 book Page 87 Monday July 26 2021 6 11 PM ...

Page 98: ...damaged if the cap strip is removed This symbol on the battery means that this product must not be treated as household waste An improperly disposed of battery can be harmful to the environment and human health Always confirm local regulations for battery disposal The battery gives off explosive hydrogen gas during normal operation A spark or flame can cause the battery to explode with enough forc...

Page 99: ...e battery 5 Release the battery holder band 4 from the hook then remove the battery taking care not to drop the terminal nuts Installation 1 Reinstall in the reverse order of removal Be sure to connect the positive terminal first then the negative terminal 2 Check all bolts and other fasteners are secure 1 Battery 2 Negative terminal lead 3 Positive terminal lead 4 Battery holder band 1 3 2 4 37K2...

Page 100: ...ort circuit or an overload in the electrical system See your dealer for repair Never use a fuse with a different rating from that specified Serious damage to the electrical system or a fire may result causing a dangerous loss of lights or engine power Blown fuse Blown fuse 37K28B31 book Page 90 Monday July 26 2021 6 11 PM ...

Page 101: ...g the fuses to prevent an accidental short circuit 2 Remove the left side cover page 41 3 Open the fuse case cover 2 and pull the sub fuse out If the fuse is blown replace it with a spare fuse 3 4 Close the fuse case cover and install the left side cover 1 Sub fuse 2 Fuse case cover 3 Spare fuse 1 3 2 37K28B31 book Page 91 Monday July 26 2021 6 11 PM ...

Page 102: ... the starter magnetic switch 5 Pull out the fuse If the main fuse is blown install the spare main fuse 5 The spare main fuse is located under the starter magnetic switch 6 Reconnect the wire connector and install the starter magnetic switch 7 Install the seat If a fuse fails repeatedly you likely have an electrical problem Have your motorcycle inspected by your dealer 1 Main fuse 2 Starter magneti...

Page 103: ...ed Check security of all fork and handlebar mounting bolts 1 Operating the motorcycle with loose worn or damaged steering or front suspension components may adversely affect vehicle handling and stability If any suspension components appear worn or damaged consult your dealer for further inspection The suspension components are directly related to safety and your dealer is qualified to determine w...

Page 104: ...dicates worn bearings 2 Check all suspension component attachment points 2 for security of their fasteners 3 Check for oil leaks in the shock absorber units If any suspension components appear worn or damaged consult your dealer for further inspection The suspension components are directly related to safety and your dealer is qualified to determine whether or not replacement parts or repairs are n...

Page 105: ...nd spring 1 for damage and loss of tension and the side stand assembly for freedom of movement If the side stand is squeaky or stiff clean the pivot area and lubricate the pivot bolt with clean engine oil 1 Side stand spring 1 37K28B31 book Page 95 Monday July 26 2021 6 11 PM ...

Page 106: ...ll warm from recent operation give the engine and exhaust system time to cool off We recommend the use of a low pressure garden hose to wash your motorcycle High pressure water or air can damage certain parts of the motorcycle High pressure washers like those at coin operated car washes can damage certain parts of your motorcycle If you use a high pressure washer avoid spraying the following areas...

Page 107: ... damage the plastic and painted surfaces 4 After cleaning rinse the motorcycle thoroughly with plenty of clean water and dry with a soft clean cloth Strong detergent residue can corrode alloy parts 5 Dry the motorcycle start the engine and let it run for several minutes 6 Test the brakes before riding the motorcycle Several applications may be necessary to restore normal braking performance 7 Lubr...

Page 108: ...h a sponge and mild detergent After washing dry with a soft clean cloth Clean the Mat Painted Surface Using plenty of water clean the mat painted surface with a soft cloth or sponge Dry with a soft clean cloth Use neutral detergent to clean mat painted surface Do not use waxes containing compounds Exhaust Pipe and Muffler Maintenance When the exhaust pipe and muffler are painted do not use a comme...

Page 109: ...own straps Avoid using rope which can loosen and allow the motorcycle to fall over To secure your motorcycle brace the front wheel against the front of the truck bed or trailer rail Attach the lower ends of two straps to the tie down hooks on your vehicle Attach the upper ends of the straps to the handlebar one on the right side the other on the left close to the fork 37K28B31 book Page 99 Monday ...

Page 110: ...ressed about half way Too much pressure is unnecessary and could damage the fork seals Use another tie down strap to keep the rear of the motorcycle from moving We recommend that you do not transport your motorcycle on its side This can damage the motorcycle and leaking petrol could be a hazard 37K28B31 book Page 100 Monday July 26 2021 6 11 PM ...

Page 111: ...erwise these repairs may be forgotten by the time the motorcycle is removed from storage STORAGE 1 Change the engine oil 2 Fill the fuel tank Make sure the fuel fill cap is properly installed Petrol is highly flammable and explosive You can be burned or seriously injured when handling fuel Stop the engine and keep heat sparks and flame away Refuel only outdoors Wipe up spills immediately 37K28B31 ...

Page 112: ... to distribute the oil Reinstall the spark plug and spark plug cap 4 Remove the battery Store in an area protected from freezing temperatures and direct sunlight Slow charge the battery once a month 5 Wash and dry the motorcycle Wax all painted surfaces Coat chrome with rustinhibiting oil 6 Lubricate the drive chain page 79 7 Inflate the tyres to their recommended pressures Place the motorcycle on...

Page 113: ... of storage 3 Charge the battery as required Install the battery 4 If your motorcycle has been stored for more than two months drain and replace the fuel 5 Perform all Pre ride Inspection checks page 43 6 Test ride the motorcycle at low speeds in a safe riding area away from traffic 37K28B31 book Page 103 Monday July 26 2021 6 11 PM ...

Page 114: ...ycle If the engine is still running turn it off and look it over carefully inspect it for fluid leaks check the tightness of critical nuts and bolts and secure such parts as the handlebar control levers brakes and wheels If there is minor damage or you are unsure about possible damage ride slowly and cautiously Sometimes crash damage is hidden or not immediately apparent so you should have your mo...

Page 115: ...peration will occur intermittently while riding Even if this symptom occurs you can continue to ride your motorcycle If unstable engine operation occurs even if sufficient fuel is available have your motorcycle inspected by your dealer as soon as possible 37K28B31 book Page 105 Monday July 26 2021 6 11 PM ...

Page 116: ...RF125FB 1 255 mm 49 4 in CAPACITIES Engine oil After draining 0 85 0 90 US qt 0 75 Imp qt After disassembly 1 0 1 1 US qt 0 9 Imp qt Fuel tank 3 7 0 98 US gal 0 81 Imp gal Fuel containing alcohol ETHANOL up to 10 by volume Passenger capacity Operator only no passenger Maximum weight capacity CRF125F 80 kg 176 lb CRF125FB 88 kg 194 lb Technical permissible weight CRF125F 168 kg 370 lb CRF125FB 178 ...

Page 117: ...take 0 10 mm 0 004 in Exhaust 0 15 mm 0 006 in CHASSIS AND SUSPENSION Caster 27 30 Trail CRF125F 81 mm 3 2 in CRF125FB 94 mm 3 7 in Tyre size front CRF125F 70 100 17M C 40M CRF125FB 70 100 19M C 42M Tyre size rear CRF125F 90 100 14M C 49M CRF125FB 90 100 16M C 51M Tyre type bias ply tube Wheel size front CRF125F 17 1 4 CRF125FB 19 1 4 Wheel size rear CRF125F 14 1 85 CRF125FB 16 1 85 37K28B31 book ...

Page 118: ...1st 3 181 2nd 1 705 3rd 1 238 4th 0 916 Final reduction CRF125F 3 538 CRF125FB 3 769 ELECTRICAL Battery YTZ4V 12 V 3 0 Ah 10 HR 3 2 Ah 20 HR Alternator 0 125 kW 5 000 min 1 rpm FUSE Main fuse 15 A Sub fuse 5 A 37K28B31 book Page 108 Monday July 26 2021 6 11 PM ...

Page 119: ...nt 3 dB A Vibration on seat Not exceed 0 5 m s2 EN1032 Operating conditions UN R41 stationary noise Uncertainty of measurement N A Vibration on handlegrip Not exceed 2 5 m s2 ISO5349 2001 Operating conditions UN R41 stationary noise Uncertainty of measurement N A 37K28B31 book Page 109 Monday July 26 2021 6 11 PM ...

Page 120: ...gpu District Shanghai China Authorized representative and importer for EU market Honda Motor Europe Ltd Aalst Office Wijngaardveld 1 Noord V 9300 Aalst Belgium Authorized representative and importer for UK market Honda Motor Europe Ltd Cain Road Bracknell Berkshire RG12 1HL United Kingdom 37K28B31 book Page 110 Monday July 26 2021 6 11 PM ...

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Honda CRF125F 2021, Owner'S Manual

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