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  5. Owner's Manual

Yamaha BADGER YFM80C Owner's Manual

Summary of BADGER YFM80C

  • Page 1

    W this atv should not be ridden by anyone under 12 years of age. Owner’s manual 4em-28199-1b yfm80n(c) read this manual carefully! It contains important safety information. Lit-11626-14-04.

  • Page 2: Introduction

    Ebu00004 introduction congratulations on your purchase of the yamaha yfm80. It represents the result of many years of yamaha experience in the production of fine sporting, touring, and pacesetting racing machines. With the purchase of this yamaha, you can now appreciate the high degree of craftsmans...

  • Page 3

    An important note to parents: this atv is not a toy. Before you let your child ride this atv, you should understand the instructions and warnings in this owner’s manual. Then be sure your child understands and will follow them. Children differ in skills, physical abilities and judgement. Some childr...

  • Page 4: Important Manual Information

    Ebu00010 important manual information failure to follow the warnings contained in this manual can result in seri- ous injury or death. Particularly important information is distinguished in this manual by the following notations: q the safety alert symbol means attention! Become alert! Your safety i...

  • Page 5: Important Notice

    Ebu00011 important notice this machine is designed and manufactured for off-road use only. It is illegal and unsafe to oper- ate this machine on any public street, road or highway. This machine complies with all applicable off-road noise level and spark arrester laws and regula- tions in effect at t...

  • Page 6: Contents

    Location of the warning and specification labels .......................1-1 safety information .........................2-1 description and machine identification.....................................3-1 identification number records ...............3-2 key identification number .....................3...

  • Page 7

    Switches ...............................................5-6 battery ..................................................5-6 tires .....................................................5-7 how to measure tire pressure ..............5-8 tire wear limit .......................................5-9 operation...

  • Page 8

    Valve clearance adjustment ...............8-16 cam chain adjustment........................8-16 front and rear brake shoe inspection .........................................8-16 front brake lever free play adjustment ........................................8-17 rear brake lever and pedal adjustment...

  • Page 9: Location of The Warning and

    Read and understand all of the labels on your machine. They contain important information for safe and proper operation of your atv. Never remove any labels from your atv. If a label becomes difficult to read or comes off, a replace- ment label is available from your yamaha dealer. 1-1 ebu00464 loca...

  • Page 10

    1-2 1 1 3 2 4em-21697-31 4em-21578-a0 5fe-21568-01.

  • Page 11: Warning

    1-3 4 5 q warning never ride as a passenger. Passengers can cause a loss of control, resulting in severe injury or death. 5fe-2151h-01 4em-21696-11.

  • Page 12: Safety Information

    2-1 ebu00029 an atv is not a toy and can be hazardous to operate. An atv handles differently from other vehicles including motorcycles and cars. A collision or rollover can occur quickly, even during routine maneuvers such as turning and riding on hills or over obstacles, if you fail to take proper ...

  • Page 13

    2-2 8 always avoid operating an atv on any paved surfaces, including sidewalks, driveways, parking lots and streets. 8 never operate an atv on any public street, road or highway, even a dirt or gravel one. 8 never operate an atv without wearing an approved motorcycle helmet that fits properly. You s...

  • Page 14

    2-3 8 never operate on excessively rough, slippery or loose terrain until you have learned and practiced the skills necessary to control the atv on such terrain. Always be especially cautious on these kinds of terrain. 8 always follow proper procedures for turning as described in this manual. Practi...

  • Page 15

    2-4 8 always use proper procedures if you stall or roll backwards when climbing a hill. To avoid stalling, use proper gear and maintain a steady speed when climbing a hill. If you stall or roll backwards, fol- low the special procedure for braking described in this manual. Dismount on the uphill sid...

  • Page 16

    2-5 8 never exceed the stated load capacity for an atv. Cargo should be properly distributed and securely attached. Reduce speed and follow instructions in this manual for carrying cargo or pulling a trailer. Allow greater distance for braking. For more information about atv safety, call the consume...

  • Page 17: Warning

    2-6 potential hazard improper handling of gasoline. What can happen gasoline can catch fire and you could be burned. How to avoid the hazard always turn off the engine when refueling. Do not refuel right after the engine has been running and is still very hot. Do not spill gasoline on the engine or ...

  • Page 18: Warning

    2-7 potential hazard starting or running the engine 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. Q warning.

  • Page 19

    3-1 1. Spark arrester 10. Rear brake lever 2. Seat 11. Parking brake 3. Front cover 12. Neutral indicator light 4. Rear brake pedal 13. Front brake lever 5. Fuel cock 14. Throttle lever 6. Rear wheel 15. Main switch 7. Footrest 16. Fuel tank cap 8. Shift pedal 17. Handlebar switch 9. Front wheel not...

  • Page 20

    Ebu00600 identification number records record the key identification number, vehicle identification number and model label informa- tion in the spaces provided for assistance when ordering spare parts from a yamaha dealer or for reference in case the vehicle is stolen. 1. Key identification number: ...

  • Page 21

    Ebu00036 vehicle identification number the vehicle identification number is stamped into the frame. 1. Vehicle identification number note: the vehicle identification number is used to identify your machine. Ebu00038 model label the model label is affixed to the frame. Record the information on this ...

  • Page 22: Control Functions

    Ebu00039 control functions w indicates a potential hazard that could result in serious injury or death. Ebu00042 main switch functions of the respective switch positions are as follows: on: the engine can be started only at this position. Off: all electrical circuits are switched off. The key can be...

  • Page 23

    Ebu00053 handlebar switches 1. Engine stop switch “eng. Stop” 2. Start switch “start” ebu00054 engine stop switch “eng. Stop” make sure that the engine stop switch is in the “run” position. The engine stop switch controls ignition and can be used at all times to stop the engine, especially in an eme...

  • Page 24: Warning

    Ebu00062 throttle lever once the engine is running, movement of the throttle lever will increase the engine speed. Regulate the speed of the machine by varying the throttle position. Because the throttle is spring-loaded, the machine will decelerate, and the engine will return to an idle any time th...

  • Page 25: Warning

    Ebu00533 speed limiter the speed limiter keeps the throttle from fully opening, even when the throttle lever is pushed to the maximum. Screwing in the adjuster limits the maximum engine power available and decreases the maximum speed of the atv. 1. Locknut 2. Adjuster a. 15 mm (0.6 in) 4-4 potential...

  • Page 26

    4-5 ebu00070 front brake lever the front brake lever is located on the right han- dlebar. Pull it toward the handlebar to apply the front brake. 1. 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 located on the ...

  • Page 27

    Ebu00074 parking brake use the parking brake when you have to start the engine or park the machine, especially on a slope. Apply the rear brake lever and push down the lock plate to apply the parking brake. Squeeze the rear brake lever to release the parking brake. 1. Lock plate 4-6 q.

  • Page 28: Warning

    Ebu00083 shift pedal this machine is equipped with a constant-mesh 3-speed transmission. The shift pedal is located on the left side of the engine. Neutral is at the bottom position. 1. Shift pedal n. Neutral 4-7 potential hazard improper use of the parking brake. What can happen the atv could start...

  • Page 29

    Ebu00092 fuel tank cap remove the fuel tank cap by turning it counter- clockwise. 1. Fuel tank cap ebu00093 fuel cock the fuel cock supplies fuel from the fuel tank to the carburetor. The fuel cock has three positions. Off: with the lever in this position fuel will not flow. Always turn the lever to...

  • Page 30

    Ebu00096 choke lever the choke is used to start a cold engine. Refer to “starting a cold engine” for proper operation. (see page 6-1.) a. Choke lever 1. Fully open “on” 2. Half open (warming up position) 3. Closed “off” 4-9 a q w e.

  • Page 31

    Ebu00566 seat to remove the seat, pull the seat lock lever upward and pull up the seat at the rear. To install the seat, insert the projection on the front of the seat into the seat holder and push down on the seat at the rear. 1. Seat lock lever note: make sure that the seat is securely fitted. 4-1...

  • Page 32

    4-11 ebu00112 w indicates a potential hazard that could result in serious injury or death..

  • Page 33: Pre-Operation Checks

    5-1 pre-operation checks before using this machine, check the following points: item routine page brakes 9 check operation, condition and free play. 5-2 ~ 5-3, 8-16 ~ 8-21 9 adjust if necessary. Fuel 9 check fuel level. 9 fill with fuel if necessary. 5-3 ~ 5-4 engine oil 9 check oil level. 9 fill wi...

  • Page 34: Warning

    5-2 potential hazard failure to inspect the atv before operat- ing. Failure to properly maintain the atv. What can happen increases the possibility 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 operating condi...

  • Page 35: Warning

    Ebu00126 fuel make sure there is sufficient gasoline in the tank. Your yamaha engine has been designed to use regular unleaded gasoline with a pump octane number ([r+m]/2) of 86 or higher, or research octane number of 91 or higher. If knocking or pinging occurs, use a different brand of gasoline or ...

  • Page 36: Warning

    5-4 gasohol there are two types of gasohol; gasohol con- taining ethanol and that containing methanol. Gasohol containing ethanol can be used if ethanol content does not exceed 10%. Gasohol containing methanol is not recommended by yamaha because it may cause fuel system damage or vehicle performanc...

  • Page 37

    Ebu00442 engine oil make sure the engine oil is at the specified level. Add oil as necessary.(see page 8-5.) c c be sure to use motor oils that do not contain anti-friction modifiers. Passenger car motor oils (often labeled “energy conserving”) contain anti-friction additives which will cause clutch...

  • Page 38

    Ebu00151 throttle lever check to see that the throttle lever operates cor- rectly. It must open smoothly and spring back to idle position when released. Repair as neces- sary for proper operation. Ebu00152 fittings and fasteners always check the tightness of chassis fittings and fasteners before a r...

  • Page 39: Warning

    5-7 ebu00157 tires 2. The tires should be set to the recom- mended pressure: 8 recommended tire pressure front 20 kpa (0.20 kgf/cm 2 , 2.9 psi) rear 20 kpa (0.20 kgf/cm 2 , 2.9 psi) 8 check and adjust tire pressures when the tires are cold. 8 tire pressures must be equal on both sides. 3. Tire press...

  • Page 40

    Ebu00159 how to measure tire pressure use the low-pressure tire gauge. Note: the low-pressure tire gauge is included as stan- dard equipment. Make two measurements of the tire pressure and use the second reading. Dust or dirt in the gauge could cause the first reading to be incorrect. Set pressure w...

  • Page 41

    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) 5-9 a.

  • Page 42: Operation

    Ebu00161 operation w indicates a potential hazard that could result in serious injury or death. Ebu00579 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 “run”. 4. Shift the transmission into neutral. 6-1 6-...

  • Page 43

    6-2 note: this model is equipped with an ignition circuit cut-off system. The engine can be started under the following conditions. A. When the transmission is in neutral. At this time the neutral indicator light should come on. If the light does not come on, ask a yamaha dealer to inspect it. B. Wh...

  • Page 44

    6. Completely close the throttle lever and start the engine by pushing the start switch. Note: if the engine fails to start, release the start switch, then push it again. Pause a few seconds before the next attempt. Each cranking should be as short as possible to preserve battery ener- gy. Do not cr...

  • Page 45

    Ebu00200 shifting this model has a 3-speed forward transmission with centrifugal automatic clutch. The transmis- sion allows you to control the amount of power you have available at a given speed or for start- ing accelerating, climbing, etc. To shift into neu- tral, return the throttle lever to its...

  • Page 46: Warning

    4. Once the machine has attained adequate speed, release the throttle lever. 5. Shift into second gear and release the shift pedal. 6. Open the throttle gradually. 7. Follow the same procedure when shifting to the next higher gear. Ebu00207 to decelerate: when slowing down or stopping, release the t...

  • Page 47

    6-6 ebu00209 engine break-in there is never a more important period in the life of your machine than the period between zero and 20 hours. For this reason, we ask that you carefully read the following material. Because the engine is brand new, you must not put an excessive load on it for the first s...

  • Page 48

    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 6-7 q.

  • Page 49: Warning

    Ebu00219 parking on a slope 1. Bring the machine to a stop by applying the brakes in low gear. 2. Stop the engine. 3. With the rear brake lever and pedal applied, apply the parking brake and slowly release the rear brake pedal. 6-8 potential hazard parking on a hill or other incline. What can happen...

  • Page 50

    Ebu00221 accessories and loading ebu00222 accessories accessories can affect the handling and control of your atv. Keep the following in mind when considering an accessory or operating an atv which has accessories. 8 choose only accessories designed for your atv. Your yamaha dealer has a variety of ...

  • Page 51

    Ebu00584 loading as originally equipped, this atv is not designed to carry cargo or tow a trailer. If you choose to add accessories so that you can carry cargo or tow a trailer, you must use common sense and good judgment. Keep the following points in mind: 8 never exceed the weight limits shown. An...

  • Page 52: Warning

    6-11 potential hazard overloading this atv or carrying or tow- ing 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 securely ...

  • Page 53

    6-12 ebu00555 w indicates a potential hazard that could result in serious injury or death..

  • Page 54: Riding

    Riding your atv 7 7-1 ok ok ok ok.

  • Page 55

    7-2.

  • Page 56

    Getting to know your atv this atv is for recreation use. This section, riding your atv, provides general atv riding instructions for recreational riding. The skills and techniques described in this section, however, are appropriate for all types of riding. Riding your atv requires special skills acq...

  • Page 57: Warning

    7-4 ride with care and good judgement get training if you are inexperienced. Beginners should get training from a certified instructor. Become familiar with this atv at slow speeds first, even if you are an experienced operator. Do not attempt to operate at maximum perfor- mance until you are totall...

  • Page 58: Warning

    7-5 not recommended for children under 12 years of age. Potential hazard failure to follow the age recommendations for this atv. What can happen use by children of atvs that are not rec- ommended for their age can lead to severe injury or death of the child. How to avoid the hazard a child under 12 ...

  • Page 59: Warning

    7-6 this machine is designed to carry operator only - passengers prohibited. Potential hazard carrying a passenger on this atv. What can happen greatly reduces your ability to balance and control this atv. Could cause an acci- dent, resulting in harm to you and/or your passenger. How to avoid the ha...

  • Page 60: Warning

    Apparel 7-7 potential hazard operating this atv without wearing an approved motorcycle helmet, eye protec- tion and protective clothing. What can happen operating without an approved motorcycle helmet increases your chances of a severe head injury or death in the event of an accident. Operating with...

  • Page 61: Warning

    7-8 do not operate after consuming alcohol or drugs. Operator’s performance capability is reduced by the influence of alcohol or drugs. Potential hazard operating this atv after consuming alco- hol or drugs. What can happen could seriously affect your judgment. Could cause you to react more slowly. ...

  • Page 62: Warning

    7-9 pre-operation checks always perform the pre-operation checks listed on page 5-1 before riding for safety and proper care of the machine. Potential hazard failure to inspect the atv before operat- ing. Failure to properly maintain the atv. What can happen increases the possibility of an accident ...

  • Page 63: Warning

    W indicates a potential hazard that could result in serious injury or death. Do not operate at speeds too fast for your skills or the conditions. Speed limiter for riders inexperienced with this model, this model is equipped with a speed limiter in the throttle lever housing. The speed limiter limit...

  • Page 64: Warning

    7-11 loading and accessories use extra caution when riding the machine with additional loads, such as accessories or cargo. The machine’s handling may be adversely affected. Reduce your speed when adding addi- tional loads. Maximum loading limit vehicle loading limit(total weight of cargo, rider and...

  • Page 65: Warning

    7-12 during operation always keep your feet on the footboards during operation. Otherwise your feet may contact the rear wheels. Potential hazard removing hands from handlebars or feet from footboards during operation. What can happen removing even one hand or foot can reduce your ability to control...

  • Page 66: Warning

    7-13 avoid wheelies and jumping. You may lose con- trol of the machine or overturn. Potential hazard attempting wheelies, jumps, and other stunts. What can happen increases the chance of an accident, including an overturn. How to avoid the hazard never attempt stunts, such as wheelies or jumps. Don’...

  • Page 67: Warning

    7-14 modifications potential hazard operating this atv with improper modifi- cations. What can happen improper installation of accessories or modification of this vehicle may cause changes in handling which in some situa- tions could lead to an accident. How to avoid the hazard never modify this atv...

  • Page 68: Warning

    Exhaust system the exhaust system on the machine is very hot during and following operation. To prevent burns, avoid touching the exhaust system. Park the machine in a place where pedestrians or children are not likely to touch it. 7-15 potential hazard hot exhaust system. What can happen someone to...

  • Page 69: Warning

    7-16 be careful where you ride this machine is designed for off-road use only. Riding on paved surfaces can cause loss of con- trol. Potential hazard operating this atv on paved surfaces. What can happen atvs are designed for off-road use only. Paved surfaces may seriously affect han- dling and cont...

  • Page 70: Warning

    7-17 do not ride on any public road, street, or high- way. Riding on public roads can result in collisions with other vehicles. Potential hazard 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 a...

  • Page 71: Warning

    7-18 know the terrain where you ride. Ride cautiously in unfamiliar areas. Stay alert for holes, rocks, or roots in the ter- rain, and other hidden hazards which may cause the machine to upset. Potential hazard failure to use extra care when operating this atv on unfamiliar terrain. What can happen ...

  • Page 72: Warning

    7-19 potential hazard failure to use extra care when operating on excessively rough, slippery or loose terrain. What can happen could cause loss of traction or vehicle control, which could result in an accident, including an overturn. How to avoid the hazard do not operate on excessively rough, slip...

  • Page 73: Warning

    7-20 when riding in an area where you might not easily be seen, such as desert terrain, mount a caution flag on the machine. Do not use the flag pole bracket as a trailer hitch. Do not ride in areas posted “no trespassing”. Do not ride on private property without getting per- mission. Potential haza...

  • Page 74

    7-21 select a large, flat area off-road to become familiar with your atv. Make sure that this area is free of obstacles and other riders. You should practice control of the throttle, brakes, shifting procedures, and turning techniques in this area before trying more difficult terrain. Always avoid r...

  • Page 75: Warning

    7-22 c c do not shift gears without releasing the throttle. Damage to the engine or drive train may occur. 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 sufficiently slowed before eng...

  • Page 76: Warning

    7-23 turning your atv to achieve maximum traction while riding off- road, the two rear wheels are mounted solidly on one axle and turn together at the same speed. Therefore, unless the wheel on the inside of the turn is allowed to slip or lose some traction, the atv will resist turning. A special tu...

  • Page 77

    7-24 this procedure should be practiced at slow speed many times in a large off-road area with no obstacles. If an incorrect technique is used, your atv may continue to go straight. If the atv doesn’t turn, come to a stop and then practice the procedure again. If the riding surface is slip- pery or ...

  • Page 78: Warning

    7-25 climbing uphill use proper riding techniques to avoid vehicle overturns on hills. Be sure that you can maneu- ver your atv well on flat ground before attempt- ing any incline and then practice riding first on gentle slopes. Try more difficult climbs only after you have developed your skill. In ...

  • Page 79: Warning

    7-26 potential hazard climbing hills improperly. What can happen could cause loss of control or cause the atv to overturn. How to avoid the hazard always follow proper procedures for climbing hills as described in this owner’s manual. Always check the terrain carefully before you start up any hill. ...

  • Page 80: Warning

    7-27 if you are climbing a hill and you find that you have not properly judged your ability to make it to the top, you should turn the atv around while you still have forward motion (provided you have the room to do so) and go down the hill. Potential hazard improperly crossing hills or turning on h...

  • Page 81: Warning

    7-28 if your atv has stalled or stopped and you believe you can continue up the hill, restart care- fully to make sure you do not lift the front wheels which could cause you to lose control. If you are unable to continue up the hill, dismount the atv on the uphill side. Physically turn the atv aroun...

  • Page 82

    7-29 when fully stopped, apply rear brake as well, and then lock parking brake. Dismount on uphill side or to a side if pointed straight uphill. Turn the atv around and remount, following the proce- dure described in the owner’s manual..

  • Page 83: Warning

    7-30 riding downhill when riding your atv downhill, shift your weight as far to the rear and uphill side of the atv as possible. Move back on the seat and sit with your arms straight. Choose a low gear which will allow the engine compression to do most of the braking for you. Improper braking may ca...

  • Page 84

    7-31 ok ok.

  • Page 85: Warning

    7-32 crossing a slope traversing a sloping surface on your atv requires you to properly position your weight to maintain proper balance. Be sure that you have learned the basic riding skills on flat ground before attempting to cross a sloping surface. Avoid slopes with slippery surfaces or rough ter...

  • Page 86

    7-33 shift your weight to the uphill side of the atv. Ok ok.

  • Page 87: Warning

    7-34 crossing through shallow water the atv can be used to cross slow moving, shallow water of up to a maximum of 20 cm (7.9 inches) in depth. Before entering the water, choose your path carefully. Enter where there is no sharp drop off, and avoid rocks or other obstacles which may be slippery or up...

  • Page 88

    7-35 test your brakes after leaving the water. Do not continue to ride your atv without verifying that you have regained proper braking ability. C c 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 fre...

  • Page 89: Warning

    7-36 riding over rough terrain riding over rough terrain should be done with caution. Look out for obstacles which could cause damage to the atv or could lead to an upset or accident. Be sure to keep your feet firmly mounted on the footboards at all times. Avoid jumping the atv as loss of control an...

  • Page 90

    7-37.

  • Page 91

    7-38 sliding and skidding care should be used when riding on loose or slippery surfaces since the atv may slide. If unexpected and uncorrected, sliding could lead to an accident. To reduce the tendency for the front wheels to slide in loose or slippery conditions, positioning your weight over the fr...

  • Page 92: Warning

    7-39 with practice, over a period of time, skill at con- trolled sliding can be developed. The terrain should be chosen carefully before attempting such maneuvers, since both stability and control are reduced. Bear in mind that sliding maneu- vers should always be avoided on extremely slippery surfa...

  • Page 93

    7-40 what to do if ... This section is designed to be a reference guide only. Be sure to read each section on riding techniques completely. What to do ... 8 if your atv doesn’t turn when you want it to: bring the atv to a stop and practice the turn- ing maneuvers again. Be sure you are putting your ...

  • Page 94

    7-41 8 if your atv is traversing a sloping surface: be sure to ride with your weight positioned towards the uphill side of the atv to maintain proper balance. If the atv starts to tip, steer down the hill (if there are no obstacles in your way) to regain balance. If you discover that the atv is goin...

  • Page 95: Periodic

    8-1 ebu00515 periodic maintenance and adjustment periodic inspection, adjustment and lubrication will keep your machine in the safest and most efficient condition possible. Safety is an obliga- tion of the machine owner. The most important points of machine inspection, adjustment and lubrication are...

  • Page 96: Warning

    8-2 the service information included in this manual is intended to provide you, the owner, with the necessary information for completing your own preventive maintenance and minor repairs. The tools provided in the owner’s tool kit are suffi- cient for this purpose, except that a torque wrench is als...

  • Page 97

    8-3 ebu00261 periodic maintenance/lubrication initial every item routine 1 3 6 6 1 month months months months year valves* 9 check valve clearance. 2 2 2 2 9 adjust if necessary. Cam chain* 9 check chain tension. 2 2 2 2 9 adjust if necessary. 9 check condition. Spark plug 9 adjust gap and clean. 2 ...

  • Page 98

    8-4 *: it is recommended that these items be serviced by a yamaha dealer. **: lithium soap base grease. W indicates a potential hazard that could result in serious injury or death. Initial every item routine 1 3 6 6 1 month months months months year clutch* 9 check operation. 2 2 2 2 9 adjust if nec...

  • Page 99

    Ebu00263 engine oil 1. Engine oil level measurement a. Place the machine on a level place. B. Warm up the engine for several minutes and stop it. C. Remove the dipstick and wipe it off with a clean rag. Insert the dipstick in the filler hole without screwing it in. Note: wait a few minutes until the...

  • Page 100

    8-6 1. Drain plug f. Reinstall the drain plug and tighten to specification. G. Fill the engine with oil and install the dip- stick. C c be sure no foreign material enters the crankcase. H. Warm up the engine for several minutes at idle speed. Check for oil leakage while warming up. C c if oil leakag...

  • Page 101

    Ebu00463 final gear oil 1. Final gear oil measurement a. Place the machine on a level place. B. Remove the dipstick and wipe it off with a clean rag. Insert the dipstick in the filler hole without screwing it in. C. Remove the dipstick and inspect the oil level. D. The oil level should be between th...

  • Page 102

    8-8 1. Drain bolt d. Install the drain bolt and tighten to specifi- cation. E. Fill the final gear case with oil. C c be sure no foreign material enters the final gear case. F. Install the dipstick. G. Check for oil leakage. If oil leakage is found, check for the cause. Q tightening torque drain bol...

  • Page 103

    8-9 ebu00286 spark plug inspection the spark plug is an important engine compo- nent 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 f...

  • Page 104

    8-10 when installing the spark plug, always clean the gasket surface and use a new gasket. Wipe off any grime from the threads and tighten to the specified torque. Ebu00292 air filter cleaning note: there is a check hose at the bottom of the air fil- ter case. If dust or water collects in this hose,...

  • Page 105: Warning

    8-11 2. Unhook the fastener and remove the air fil- ter element. 1. Fastener 2. Air filter element 3. Wash the element gently but thoroughly in solvent. 4. Squeeze the excess solvent out of the filter and let it dry. C c do not twist the filter element when squeez- ing it. W q potential hazard using...

  • Page 106

    8-12 5. Inspect the element. If damaged, replace it. 6. Apply yamaha foam air filter oil or other quality foam air filter oil to the element. If foam air filter oil is not available, sae10w30 motor oil may be used. Note: the element should be wet but not dripping. 7. Reinstall the element and front ...

  • Page 107

    8-13 ebu00457 spark arrester cleaning be sure the exhaust pipe and muffler are cool before cleaning the spark arrester. 1. Remove the screw. 2. Remove the tailpipe by pulling it out of the muffler. 3. Tap the tailpipe lightly, then use a wire brush to remove any carbon deposits from the spark arrest...

  • Page 108: Warning

    8-14 potential hazard improper cleaning of the spark arrester. Hot exhaust system what can happen could injure the eyes. Could cause burns. Could cause carbon monoxide poisoning, possibly leading to death. Could start a fire. How to avoid the hazard when cleaning the spark arrester: always let the e...

  • Page 109

    8-15 ebu00296 carburetor adjustment the carburetor is a vital part of the engine and requires very sophisticated adjustment. Most adjusting should be left to a yamaha dealer who has the professional knowledge and experience to do so. However, the idling speed may be per- formed by the owner as a par...

  • Page 110

    8-16 1. Throttle stop screw ebu00303 valve clearance adjustment the correct valve clearance changes with use, resulting in improper fuel/air supply or engine noise. To prevent this, the valve clearance must be adjusted regularly. This adjustment however, should be left to a professional yamaha servi...

  • Page 111

    1. Wear limit 2. Wear indicator 1. Wear limit 2. Wear indicator ebu00323 front brake lever free play adjustment note: before adjusting the brake, inspect the front brake shoes. The front brake lever free play should be adjust- ed to 10 ~ 12 mm (0.4 ~ 0.5 in) at the brake lever pivot. If the free pla...

  • Page 112

    8-18 1. Loosen the upper locknut and fully turn in the adjusting bolt. 2. Loosen the lower locknut. 3. Turn the lower adjusting bolt until specified free play is obtained. 1. Upper locknut 2. Upper adjusting bolt 3. Lower locknut 4. Lower adjusting bolt 4. Tighten the lower locknut. 5. While applyin...

  • Page 113: Warning

    Ebu00335 rear brake lever and pedal adjustment 1. Brake lever free play adjustment a. Loosen the brake cable locknut. B. Turn the adjusting bolt at the brake lever until brake lever free play is 5 ~ 8 mm (0.20 ~ 0.31 in). C. Tighten the locknut. A. 5 ~ 8 mm (0.20 ~ 0.31 in) 1. Locknut 2. Adjusting b...

  • Page 114

    8-20 note: if specified free play cannot be obtained, tighten the brake cable adjusting nut at the rear wheel hub until brake lever free play is 5 ~ 8 mm (0.20 ~ 0.31 in). 1. Adjusting nut (brake cable) 2. Brake pedal free play adjustment a. Turn the brake rod adjusting nut at the rear wheel hub unt...

  • Page 115: Warning

    8-21 1. Adjusting nut (brake rod) q potential hazard operating with improperly 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: 8 make sure the brakes operate smooth- ly and that the free play is co...

  • Page 116

    Ebu00345 clutch adjustment 1. Remove the rubber cap. 2. Loosen the locknut. 3. Slowly turn the adjusting bolt clockwise until resistance is felt. Then turn it 1/8 counterclockwise. 1. Rubber cap 2. Locknut 3. Adjusting bolt 4. Tighten the locknut to the specified torque. Note: turn the adjusting bol...

  • Page 117: Warning

    Ebu00356 cable inspection and lubrication lubricate the inner cables and the cable ends. If the cables do not operate smoothly, ask a yamaha dealer to replace them. Ebu00727 brake and shift pedal/brake lever lubrication lubricate the pivoting parts of each lever and pedal. 8-23 potential hazard dama...

  • Page 118

    8-24 ebu00367 knuckle shaft and steering shaft lubrication lubricate the pivot points. Use a grease gun. Ebu00373 wheel removal 1. Elevate the wheel by placing a suitable stand under the frame. 2. Remove the nuts from the wheel. 3. Remove the wheel assembly. Ebu00375 wheel installation when installi...

  • Page 119

    Ebu00378 battery check the level of the battery fluid and see if the terminals are tight. Add distilled water if the fluid level is low. C c do not leave or store the battery on its side. When inspecting the battery, be sure the breather hose is routed correctly. If it touch- es the frame or exists ...

  • Page 120: Warning

    8-26 potential hazard failure to handle batteries or battery elec- trolyte carefully. What can happen you could be poisoned. You could be severely burned by the sulfuric acid in bat- tery electrolyte. Batteries produce explosive gases. How to avoid the hazard avoid contact with skin, eyes or clothin...

  • Page 121

    Ebu00382 replenishing the battery fluid a poorly maintained battery will corrode and dis- charge quickly. The battery fluid should be checked at least once a month. 1. The level should be between the upper and lower level marks. Use only distilled water if refilling is necessary. 1. Maximum level ma...

  • Page 122: Warning

    8-28 ebu00390 fuse replacement 1. The fuse case is located under the seat. 2. If the fuse is blown, turn off the main switch and install a new fuse of the specified amperage. Then turn on the switches. If the fuse immediately blows again, consult a yamaha dealer. 1. Main fuse 2. Spare fuse c c to pr...

  • Page 123: Warning

    Ebu00412 troubleshooting although yamaha machines receive a rigid inspection before shipment from the factory, trouble may occur during operation. Any prob- lem in the fuel, compression, or ignition systems can cause poor starting and loss of power. The troubleshooting chart describes a quick, easy ...

  • Page 124

    Ebu00440 troubleshooting chart 8-30 check fuel flow 1. Fuel check if there is fuel in the fuel tank 2. Compression use electric starter to see if there is compression 3. Ignition remove plug and check electrode wet wipe clean with dry cloth dry attach plug cap and ground to chassis use electric star...

  • Page 125: Cleaning and Storage

    Ebu00419 cleaning and storage a. Cleaning frequent, thorough cleaning of your machine will not only enhance its appearance but will improve its general performance and extend the useful life of many components. 1. Before cleaning the machine: a. Block off the end of the exhaust pipe to prevent water...

  • Page 126: Warning

    9-2 5. Rinse the machine off immediately with clean water and dry all surfaces with a chamois, clean towel or soft absorbent cloth. 6. Clean the seat with a vinyl upholstery cleaner to keep the cover pliable and glossy. 7. Automotive type wax may be applied to all painted and chrome plated surfaces....

  • Page 127

    9-3 ebu00530 b. Storage long term storage (60 days or more) of your machine will require some preventive proce- dures to guard against deterioration. After thor- oughly cleaning the machine, prepare for stor- age as follows: 1. Fill the fuel tank with fresh fuel and add the specified amount of yamah...

  • Page 128: Specifications

    10-1 ebu00428 specifications model yfm80 dimension: overall length 1,520 mm (59.8 in) overall width 825 mm (32.5 in) overall height 960 mm (37.8 in) seat height 650 mm (25.6 in) wheel base 1,030 mm (40.6 in) minimum ground clearance 100 mm ( 3.9 in) minimum turning radius 2,000 mm (78.7 in) basic we...

  • Page 129

    10-2 model yfm80 engine oil: type recommended engine oil classification: api service se, sf, sg type or higher c c be sure to use motor oils that do not contain anti-friction modifiers. Passenger car motor oils (often labeled “energy conserving”) contain anti-friction additives which will cause clut...

  • Page 130

    10-3 model yfm80 final gear oil: type sae80api “gl-4” hypoid gear oil quantity: total amount 0.12 l (0.11 imp qt, 0.13 us qt) air filter: wet type element fuel: type unleaded fuel tank capacity 6.8 l (1.5 imp gal, 1.8 us gal) reserve amout 0.9 l (0.2 imp gal, 0.2 us gal) caburetor: type/manufacturer...

  • Page 131

    10-4 model yfm80 transmission: primary reduction system spur gear primary reduction ratio 65/20 (3.250) secondary reduction system shaft drive secondary reduction ratio 19/18 × 34/10 (3.588) transmission type constant mesh 3-speed operation left foot operation gear ratio: 1st 39/11 (3.545) 2nd 35/17...

  • Page 132

    10-5 model yfm80 brake: front brake type drum brake operation right hand operation rear brake type drum brake operation left hand and right foot operation suspension: front leading arm rear swingarm shock absorber: front coil spring, oil damper rear coil spring, oil damper wheel travel: front 57 mm ...

  • Page 133: Noise Regulation

    Ebu00430 noise regulation tampering with noise control system prohibited: federal law prohibits the following acts or the causing thereof: (1) the removal or rendering inopera- tive by any person other than for purposes of maintenance, repair, or replacement of any device or element of design incorp...

  • Page 134: Maintenance Record

    Ebu00431 maintenance record copies of work orders and/or receipts for parts you purchase and install will be required to document maintenance done in accordance with the warranty. The chart below is printed only as a reminder to you that the maintenance work is required. It is not acceptable proof o...

  • Page 135

    13-1 ebu00432.

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    13-2 13.

  • Page 137

    Ebu00435 14-1.

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    14-2 14.

  • Page 139

    Ebu00436 w indicates a potential hazard that could result in serious injury or death..

  • Page 140

    Ebu00437.

  • Page 141: Warning

    Printed on recycled paper printed in japan 2000·3–1.7 × 1 ! (e) yamaha motor co., ltd. Improper atv use can result in severe injury or death. Q warning always use an approved helmet and protective gear never use on public roads never carry passengers never use with drugs or alcohol never operate: 9 ...