Instruction/ maintenance manual of the product YFM25RX Yamaha
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This A OWNER’S MANUAL LIT -1 1626-21-22 4D3-28199-10 This ATV should not be ridden by anyone under 16 years of age. YFM25RX WARNING READ THIS MANUAL CAREFULLY! It contains important safety information.
EBU17091.
EBU17170 INTRODUCTION EBU17300 Congratulations on your purchase of the Yamaha YFM25RX. This ATV represents the result of many years of Yamaha experience in the production of fine sporting, touring, and pacesetting racing machines.
EBU17330 IMPORTANT MANUAL INFORMATION EBU17341 FAILURE TO FOLLOW THE WARNINGS CONTAINED IN THIS MANUAL CAN RESULT IN SERIOUS IN- JURY OR DEATH. Particularly important information is distinguished in this manual by the following notations: * Product and specifications are subject to change without notice.
EBU17350 IMPORTANT NOTICE EBU17360 Welcome to the Yamaha world of motor sports! This ATV is designed and manufactured for OFF-ROAD use only. It is illegal and unsafe to operate this ATV on any public street, road or highway.
W ARNING EWB00010 Indicates a potential hazard that could result in serious injury or death. EBU17420 TABLE OF CONTENTS SAFETY INFORMATION .............................. 1-1 LOCATION OF THE WARNING AND SPECIFICATION LABELS ............................
Shifting ...................................................... 6-3 Engine break-in ......................................... 6-5 Parking ...................................................... 6-6 Parking on a slope ...................................
Lubricating the steering shaft .................. 8-38 Battery ..................................................... 8-38 Replacing the fuse .................................. 8-40 Replacing a headlight bulb ...................... 8-42 Adjusting a headlight beam .
1-1 1 2 3 4 5 6 7 8 9 10 11 EBU17430 SAFETY INFORMATION SAFETY INFORMATION EBU17572 AN ATV IS NOT A TOY AND CAN BE HAZARD- OUS TO OPERATE. An ATV handles differently from other vehicles, in- cluding motorcycles and cars.
1-2 1 2 3 4 5 6 7 8 9 10 11 ● Never attempt wheelies, jumps, or other stunts. ● Always inspect your ATV each time you use it to make sure it is in safe operating condition. Al- ways follow the inspection and maintenance procedures and schedules described in this manual.
1-3 1 2 3 4 5 6 7 8 9 10 11 backwards, follow the special procedure for braking described in this manual. Dismount on the uphill side or to a side if pointed straight up- hill. Turn the ATV around and remount, following the procedure described in this manual.
1-4 1 2 3 4 5 6 7 8 9 10 11 EWB00021 EWB00030 W ARNING 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.
1-5 1 2 3 4 5 6 7 8 9 10 11 WHAT CAN HAPPEN Exhaust fumes are poisonous and may cause loss of consciousness and death with- in a short time. HOW TO AVOID THE HAZARD Always operate your ATV in an area with ad- equate ventilation.
2-1 1 2 3 4 5 6 7 8 9 10 11 EBU17660 LOCATION OF THE WARNING AND SPECIFICATION LABELS 1 2 4 3 5.
2-2 1 2 3 4 5 6 7 8 9 10 11 EBU17670 Read and understand all of the labels on your ATV. These labels contain important information for safe and proper operation. Never remove any labels from your ATV. If a label becomes difficult to read or comes off, request a replace- ment label from your Yamaha dealer.
2-3 1 2 3 4 5 6 7 8 9 10 11.
2-4 1 2 3 4 5 6 7 8 9 10 11 NEVER NEVER.
3-1 1 2 3 4 5 6 7 8 9 10 11 EBU17680 DESCRIPTION EBU17690 Left view EBU17700 Right view 1. Headlights 2. Fuel cock 3. Starter (choke) 4. Throttle stop screw 5. Fuse 6. T ail/brak e light 7. Shift pedal 7 12 3 4 5 6 1. Spark arrester 2. Seat 3. Fuel tank cap 4.
3-2 1 2 3 4 5 6 7 8 9 10 11 EBU17712 Controls and instruments NO TE: The ATV you have purchased may differ slightly from the figures shown in this manual. 1. Clutch lev er 2. Handlebar switches 3. P arking brake le ver 4. Main switch 5. Throttle lev er 6.
4-1 1 2 3 4 5 6 7 8 9 10 11 EBU17720 INSTRUMENT AND CONTROL FUNCTIONS W ARNING EWB00010 Indicates a potential hazard that could result in serious injury or death. EBU17740 Main switch The positions of the main switch are as follows: ON All electrical systems are supplied with power, and the engine can be started.
4-2 1 2 3 4 5 6 7 8 9 10 11 EBU17781 Indicator light EBU17860 Neutral indicator light “” This indicator light comes on when the transmis- sion is in the neutral position. EBU18061 Handlebar switches EBU18070 Engine stop switch “ ENG. STOP ” Set this switch to “RUN” before starting the engine.
4-3 1 2 3 4 5 6 7 8 9 10 11 EBU18090 Start switch “ START ” Push this switch to crank the engine with the start- er. CAUTION: ECB00050 See the starting instructions on page 6-1 prior to starting the engine. EBU18120 Light switch “ LIGHTS ” Set this switch to “LO” to turn on the low beams and the taillight.
4-4 1 2 3 4 5 6 7 8 9 10 11 EBU18311 Speed limiter Your ATV was delivered with an adjustable speed limiter. The speed limiter keeps the throttle from fully opening, even when the throttle lever is pushed to the maximum.
4-5 1 2 3 4 5 6 7 8 9 10 11 EWB00190 EBU18382 Clutch lever The clutch lever is located on the left handlebar and the ignition circuit cut-off system is incorporat- ed in the clutch lever holder. To disengage the clutch, pull the clutch lever toward the handlebar grip.
4-6 1 2 3 4 5 6 7 8 9 10 11 EBU18432 Brake pedal The brake pedal is located on the right side of the ATV. To apply the rear brake, push down on the brake pedal. EBU18510 Parking brake lever Use the parking brake before starting the engine or parking the ATV, especially on a slope.
4-7 1 2 3 4 5 6 7 8 9 10 11 EWB00170 EBU18530 Shift pedal This ATV is equipped with a constant-mesh 5- speed transmission. The shift pedal is located on the left side of the engine and is used in combina- tion with the clutch when shifting. 1. P arking brake le ver (loc ked position) 1.
4-8 1 2 3 4 5 6 7 8 9 10 11 EBU18720 Fuel tank cap Remove the fuel tank cap by turning it counter- clockwise. EBU18730 Fuel Make sure that there is sufficient fuel in the tank. Fill the fuel tank to the bottom of the filler tube as shown. 1. Shift pedal 1 1.
4-9 1 2 3 4 5 6 7 8 9 10 11 CAUTION: ECB00070 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 system.
4-10 1 2 3 4 5 6 7 8 9 10 11 EBU18820 Fuel cock The fuel cock supplies fuel from the tank to the car- buretor while also filtering it. The fuel cock lever positions are explained as fol- lows and shown in the illustrations. OFF With the fuel cock lever in this position, fuel will not flow.
4-11 1 2 3 4 5 6 7 8 9 10 11 ON With the fuel cock lever in this position, fuel flows to the carburetor. Turn the fuel cock lever to this position when starting the engine and riding. RES This indicates reserve. With the fuel cock lever in this position, the fuel reserve is made available.
4-12 1 2 3 4 5 6 7 8 9 10 11 the starter (choke). Move the starter (choke) in direction (b) to turn off the starter (choke). See the “ Starting a cold engine ” section on page 6-1 for proper operation.
4-13 1 2 3 4 5 6 7 8 9 10 11 EBU18980 Adjusting the front shock absorber assemblies The spring preload can be adjusted to suit the rid- er ’ s weight and the riding conditions.
4-14 1 2 3 4 5 6 7 8 9 10 11 EWB00350 W ARNING EWB00010 Indicates a potential hazard that could result in serious injury or death. W ARNING POTENTIAL HAZARD Improper shock absorber assembly adjust- ment. WHAT CAN HAPPEN Uneven adjustment can cause poor handling and loss of stability, which could lead to an accident.
5-1 1 2 3 4 5 6 7 8 9 10 11 EBU19200 PRE-OPERATION CHECKS EBU19212 Pre-operation check list Before operating this ATV, be sure to check the items listed in the following table. EWB00470 NO TE: The maintenance of some items in the table has to be performed by a Yamaha dealer.
5-2 1 2 3 4 5 6 7 8 9 10 11 Engine oil ● Check oil le v el in engine, and add recommended oil to speci fi ed lev el if necessary . ● Check A TV f or oil leakage. Correct if necessar y . 5-4, 8-11 Front brake ● Check operation. If soft or spongy , hav e Y amaha dealer bleed hydr aulic system.
5-3 1 2 3 4 5 6 7 8 9 10 11 Chassis fasteners ● Make sure that all nuts , bolts and screws are properly tightened. 5-9 Instruments, lights and switches ● Check operation, and correct if necessary .
5-4 1 2 3 4 5 6 7 8 9 10 11 EBU19530 Fuel Make sure that there is sufficient fuel in the tank. (See page 4-8.) EWB00500 EBU19560 Engine oil Make sure that the engine oil is at the specified lev- el.
5-5 1 2 3 4 5 6 7 8 9 10 11 tem. Brake operation Test the brakes at slow speed after starting out to make sure they are working properly. If the brakes do not provide proper braking performance, check the brake pads for wear. (See page 8-23.) EWB00540 EBU19761 Throttle lever Check the operation of the throttle lever.
5-6 1 2 3 4 5 6 7 8 9 10 11.
5-7 1 2 3 4 5 6 7 8 9 10 11 EBU19781 Tires EWB00561 W ARNING POTENTIAL HAZARD Operating this ATV with improper tires, or with improper or uneven tire pressure. WHAT CAN HAPPEN Use of improper tires on this ATV, or opera- tion of this ATV with improper or uneven tire pressure, may cause loss of control, increas- ing your risk of accident.
5-8 1 2 3 4 5 6 7 8 9 10 11 EBU19820 Measuring the tire pressure Use the low-pressure tire gauge. NO TE: 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.
5-9 1 2 3 4 5 6 7 8 9 10 11 EBU19830 Tire wear limit Replace the tire when the tire groove decreases to 3 mm (0.12 in). EBU19840 Chassis fasteners Make sure that all nuts, bolts and screws are prop- erly tightened. EBU19850 Instruments, lights and switches Check that all instruments, lights and switches are working properly.
6-1 1 2 3 4 5 6 7 8 9 10 11 EBU19870 OPERATION W ARNING EWB00010 Indicates a potential hazard that could result in serious injury or death. EBU19890 EWB00610 EBU20091 Starting a cold engine EWB00620 CAUTION: ECB00150 See the “ Engine break-in ” section on page 6-5 prior to operating the engine for the first time.
6-2 1 2 3 4 5 6 7 8 9 10 11 light does not come on, have a Yamaha deal- er check the electrical circuit. NO TE: This model is equipped with an ignition circuit cut- off system. The engine can be started under the following conditions. ● The transmission is in neutral.
6-3 1 2 3 4 5 6 7 8 9 10 11 attempt. 7. If the engine is started with the starter (choke) in position (1), the starter (choke) should be returned to position (2) to warm up the engine. If the engine is started with the starter (choke) in position (2), keep the starter (choke) in this position to warm up the engine.
6-4 1 2 3 4 5 6 7 8 9 10 11 EBU20560 To start out and accelerate 1. Release the throttle lever. CAUTION: ECB00200 Always close the throttle before shifting gears, otherwise damage to the engine and drive train may result. 2. Pull the clutch lever to disengage the clutch.
6-5 1 2 3 4 5 6 7 8 9 10 11 CAUTION: ECB00180 ● Even with the transmission in the neutral po- sition, do not coast for long periods of time with the engine off, and do not tow the ATV for long distances. The transmission is prop- erly lubricated only when the engine is run- ning.
6-6 1 2 3 4 5 6 7 8 9 10 11 160 – 320 km (100 – 200 mi) or 10 – 20 hours Avoid prolonged operation above 3/4 throttle. Rev the engine through the gears freely, but do not use full throttle at any time. 320 km (200 mi) or 20 hours and beyond The ATV can now be operated normally.
6-7 1 2 3 4 5 6 7 8 9 10 11 1. Bring the ATV to a stop by applying the brakes in first gear. 2. Stop the engine and release the clutch lever. 3. With the rear brake applied, apply the parking brake and slowly release the brake pedal. EBU20910 Accessories and loading EBU20920 Accessories Accessories can affect the handling and control of your ATV.
6-8 1 2 3 4 5 6 7 8 9 10 11 limits your ability to move around on the seat, or one that limits your view. ● Use extra caution when riding an ATV with ac- cessories. The ATV may handle differently than it does without accessories. EBU20930 Loading As originally equipped, this ATV is not designed to carry cargo or tow a trailer.
6-9 1 2 3 4 5 6 7 8 9 10 11 W ARNING EWB00010 Indicates a potential hazard that could result in serious injury or death. WHAT CAN HAPPEN Could cause changes in ATV handling which could lead to an accident. HOW TO AVOID THE HAZARD Never exceed the stated load capacity for this ATV.
7-1 1 2 3 4 5 6 7 8 9 10 11 EBU21131 RIDING YOUR ATV.
7-2 1 2 3 4 5 6 7 8 9 10 11 W ARNING EWB00010 Indicates a potential hazard that could result in serious injury or death. EBU21591 GETTING TO KNOW YOUR ATV This ATV is intended for recreational use by expe- rienced operators only.
7-3 1 2 3 4 5 6 7 8 9 10 11 EWB01280 Riding your ATV requires skills acquired through practice over a period of time. Take the time to learn the basic techniques well before attempting more difficult maneuvers. Not recommended for children under 16 years of age.
7-4 1 2 3 4 5 6 7 8 9 10 11 This ATV is designed to carry operator only – passengers prohibited. EWB00910 W ARNING POTENTIAL HAZARD Carrying a passenger on this ATV. WHAT CAN HAPPEN Greatly reduces your ability to balance and control this ATV. Could cause an accident, resulting in harm to you and/or your passen- ger.
7-5 1 2 3 4 5 6 7 8 9 10 11 Apparel EWB00920 W ARNING POTENTIAL HAZARD Operating this ATV without wearing an ap- proved motorcycle helmet, eye protection 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 acci- dent.
7-6 1 2 3 4 5 6 7 8 9 10 11 Do not operate after consuming alcohol or drugs. The operator ’ s performance capability is reduced by the influence of alcohol or drugs. EWB00930 Pre-operation checks Always perform the pre-operation checks listed on page 5-1 before riding for proper care of the ATV and to ensure safety.
7-7 1 2 3 4 5 6 7 8 9 10 11 EWB00940 EWB00950 W ARNING EWB00010 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. EWB00960 W ARNING POTENTIAL HAZARD Failure to inspect the ATV before operating.
7-8 1 2 3 4 5 6 7 8 9 10 11 Speed limiter For riders less experienced with this model, the throttle lever housing is equipped with a speed lim- iter. The speed limiter keeps the throttle from fully opening, even when the throttle lever is pushed to the maximum.
7-9 1 2 3 4 5 6 7 8 9 10 11 EWB00970 During operation Always keep your feet on the footboards during op- eration, otherwise they may contact the rear wheels. EWB00980 W ARNING POTENTIAL HAZARD Overloading this ATV or carrying or towing cargo improperly.
7-10 1 2 3 4 5 6 7 8 9 10 11 Avoid wheelies and jumping. You may lose control of the ATV or overturn. EWB00990 WHAT CAN HAPPEN Removing even one hand or foot can reduce your ability to control the ATV or could cause you to lose your balance and fall off of the ATV.
7-11 1 2 3 4 5 6 7 8 9 10 11 Modifications EWB01000 Exhaust system The exhaust system on the ATV is very hot during and following operation. To prevent burns, avoid touching the exhaust system. Park the ATV in a place where pedestrians or children are not likely to touch it.
7-12 1 2 3 4 5 6 7 8 9 10 11 BE CAREFUL WHERE YOU RIDE This ATV is designed for off-road use only. Riding on paved surfaces can cause loss of control. EWB01020 Do not ride on any public road, street, or highway. Riding on public roads can result in collisions with other vehicles.
7-13 1 2 3 4 5 6 7 8 9 10 11 EWB01030 Know the terrain where you ride. Ride cautiously in unfamiliar areas. Stay alert for holes, rocks, or roots in the terrain, and other hidden hazards which may cause the ATV to upset. EWB01040 W ARNING POTENTIAL HAZARD Operating this ATV on public streets, roads or highways.
7-14 1 2 3 4 5 6 7 8 9 10 11 EWB01050 WHAT CAN HAPPEN You can come upon hidden rocks, bumps, or holes, without enough time to react. Could result in the ATV overturning or going out of control. HOW TO AVOID THE HAZARD Go slowly and be extra careful when operat- ing on unfamiliar terrain.
7-15 1 2 3 4 5 6 7 8 9 10 11 When riding in an area where you might not easily be seen, such as desert terrain, mount a caution flag on the ATV. DO NOT use the flag pole bracket as a trailer hitch. EWB01060 W ARNING POTENTIAL HAZARD Operating in areas where you might not be seen by other off-road vehicles.
7-16 1 2 3 4 5 6 7 8 9 10 11 Do not ride in areas posted “ no trespassing ” . Do not ride on private property without getting per- mission. 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.
7-17 1 2 3 4 5 6 7 8 9 10 11 EWB01240 CAUTION: ECB00230 Do not shift gears without releasing the throt- tle. Damage to the engine or drive train may oc- cur. When slowing down or stopping, release the throt- tle and apply the brakes smoothly and evenly.
7-18 1 2 3 4 5 6 7 8 9 10 11 EWB01220 As you approach a curve, slow down and begin to turn the handlebars in the desired direction. As you do so, put your weight on the footboard to the out- side of the turn (opposite your desired direction) and lean your upper body into the turn.
7-19 1 2 3 4 5 6 7 8 9 10 11 curves. Improper riding procedures such as abrupt throttle changes, excessive braking, incorrect body move- ments, or too much speed for the sharpness of the turn may cause the ATV to tip. If the ATV begins to tip over to the outside while negotiating a turn, lean more to the inside.
7-20 1 2 3 4 5 6 7 8 9 10 11 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.
7-21 1 2 3 4 5 6 7 8 9 10 11 EWB01190 If your ATV has stalled or stopped and you believe you can continue up the hill, restart carefully 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 up- hill side.
7-22 1 2 3 4 5 6 7 8 9 10 11 immediately on the uphill side. EWB01251 RIDING DOWNHILL When riding your ATV downhill, shift your weight as far to the rear and uphill side of the ATV as pos- sible. Move back on the seat and sit with your arms straight. Choose a low gear which will allow the en- gine compression to do most of the braking for you.
7-23 1 2 3 4 5 6 7 8 9 10 11 braking may also cause a loss of traction. Whenever possible, ride your ATV straight down- hill. Avoid sharp angles which could allow the ATV to tip or roll over. Carefully choose your path and ride no faster than you will be able to react to ob- stacles which may appear.
7-24 1 2 3 4 5 6 7 8 9 10 11 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.
7-25 1 2 3 4 5 6 7 8 9 10 11 EWB01141 CROSSING THROUGH SHALLOW WATER The ATV can be used to cross slow moving, shal- low water of up to a maximum of 35 cm (14 in) 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 upset the ATV.
7-26 1 2 3 4 5 6 7 8 9 10 11 EWB01150 Test your brakes after leaving the water. Do not continue to ride your ATV without verifying that you have regained proper braking ability. W ARNING POTENTIAL HAZARD Operating this ATV through deep or fast flowing water.
7-27 1 2 3 4 5 6 7 8 9 10 11 CAUTION: ECB00240 After riding your ATV in water, be sure to drain the trapped water by removing the check hose at the bottom of the air filter case. Wash the ATV in fresh water if it has been operated in salt water or muddy conditions.
7-28 1 2 3 4 5 6 7 8 9 10 11 SLIDING AND SKIDDING Care should be used when riding on loose or slip- pery surfaces since the ATV may slide. If unex- pected and uncorrected, sliding could lead to an accident.
7-29 1 2 3 4 5 6 7 8 9 10 11 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 re- duced.
7-30 1 2 3 4 5 6 7 8 9 10 11 Lean more into the turn to regain balance. If nec- essary, gradually let off the throttle and/or steer to the outside of the turn. (See page 7-17.) ● If your ATV starts to slide sideways: Steer in the direction of the slide if you have the room.
8-1 1 2 3 4 5 6 7 8 9 10 11 EBU21647 PERIODIC MAINTENANCE AND MINOR REPAIR EBU21660 Safety is an obligation of the owner. Periodic in- spection, adjustment and lubrication will keep your ATV in the safest and best operating condition possible. The most important points of inspection, adjustment, and lubrication are explained on the following pages.
8-2 1 2 3 4 5 6 7 8 9 10 11 The service information included in this manual and the tools provided in the owner ’ s tool kit are in- tended to assist you in the performance of preven- tive maintenance and minor repairs. However, additional tools such as a torque wrench may be necessary to perform certain maintenance work correctly.
8-3 1 2 3 4 5 6 7 8 9 10 11 EBU21742 Periodic maintenance chart for the emission control system NO TE: ● For ATVs not equipped with an odometer or an hour meter, follow the month maintenance intervals. ● For ATVs equipped with an odometer or an hour meter, follow the km (mi) or hours maintenance inter- vals.
8-4 1 2 3 4 5 6 7 8 9 10 11 6 * Exhaust system ● Check f or leakage and replace gasket(s) if neces- sary . ● Check f or looseness and tighten all screw clamps and joints if necessary .
8-5 1 2 3 4 5 6 7 8 9 10 11 EBU21864 General maintenance and lubrication chart NO . ITEM CHECK OR MAINTENANCE JOB INITIAL EVER Y Whiche v- er comes fi rst month 1 3 6 6 12 km (mi) 320 (200) 1300 (800) 2500 (1600) 2500 (1600) 5000 (3200) hours 20 80 160 160 320 1 Air fi lter element ● Clean and replace if necessary .
8-6 1 2 3 4 5 6 7 8 9 10 11 10 * Swingarm pivots ● Check operation and f or e xcessive pla y , and replace bearings if necessar y . ● Lubricate with lithium-soap-based grease. √√√ 11 * Upper and lower arm pivots ● Lubricate with lithium-soap-based grease.
8-7 1 2 3 4 5 6 7 8 9 10 11 20 Engine oil ● Change. ● Check A TV f or oil leakage, and correct if neces- sary . √ √√√ 21 Engine oil fi lter ele- ment ● Clean or replace if necessary . √√√ 22 * Moving parts and cables ● Lubricate.
8-8 1 2 3 4 5 6 7 8 9 10 11 EBU23070 NO TE: ● 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.
8-9 1 2 3 4 5 6 7 8 9 10 11 W ARNING EWB00010 Indicates a potential hazard that could result in serious injury or death. EBU23211 Checking the spark plug The spark plug is an important engine component, which is easy to check.
8-10 1 2 3 4 5 6 7 8 9 10 11 To check the spark plug 1. Check that the porcelain insulator around the center electrode of the spark plug is a medi- um-to-light tan (the ideal color when the ATV is ridden normally). NO TE: If the spark plug shows a distinctly different color, the engine could be operating improperly.
8-11 1 2 3 4 5 6 7 8 9 10 11 2. Clean the surface of the spark plug gasket and its mating surface, and then wipe off any grime from the spark plug threads. 3. Install the spark plug with the spark plug wrench, and then tighten it to the specified torque.
8-12 1 2 3 4 5 6 7 8 9 10 11 NO TE: The engine oil should be between the minimum and maximum level marks. 5. If the engine oil is at or below the minimum level mark, add sufficient oil of the recom- mended type to raise it to the correct level. 6. Insert the dipstick into the oil filler hole, and then tighten the engine oil filler cap.
8-13 1 2 3 4 5 6 7 8 9 10 11 CAUTION: ECB00310 When removing the engine oil drain bolt, the compression spring, oil strainer and O-ring will fall out. Take care not to lose these parts. NO TE: Skip steps 5 – 9 if the oil filter element is not being cleaned.
8-14 1 2 3 4 5 6 7 8 9 10 11 10. Install the engine oil drain bolt and tighten it to the specified torque. CAUTION: ECB00320 Before installing the engine oil drain bolt, be sure to install the O-ring, compression spring and oil strainer.
8-15 1 2 3 4 5 6 7 8 9 10 11 12. Start the engine, and then let it idle for several minutes while checking it for oil leakage. If oil is leaking, immediately turn the engine off and check for the cause. 13. Turn the engine off, wait at least ten minutes, and then check the oil level and correct it if necessary.
8-16 1 2 3 4 5 6 7 8 9 10 11 3. Loosen the wing bolt. 4. Remove the air filter element together with the wing bolt and washer. 5. Remove the wing bolt and washer from the air filter element. 6. Remove the sponge material from the air filter element frame.
8-17 1 2 3 4 5 6 7 8 9 10 11 7. Wash the sponge material gently but thor- oughly in solvent. EWB01900 8. Squeeze the excess solvent out of the sponge material and let it dry. CAUTION: ECB00440 Do not twist the sponge material when squeez- ing it. 9. Check the sponge material and replace it if damaged.
8-18 1 2 3 4 5 6 7 8 9 10 11 NO TE: The sponge material should be wet but not drip- ping. 11. Pull the sponge material over the air filter ele- ment frame. 12. Install the washer onto the air filter element frame, and then insert the wing bolt into the hole in the air filter element frame.
8-19 1 2 3 4 5 6 7 8 9 10 11 will affect carburetor jetting with subsequent poor performance and possible engine over- heating. EBU28890 Cleaning the spark arrester Be sure the exhaust pipe and muffler are cool be- fore cleaning the spark arrester. 1.
8-20 1 2 3 4 5 6 7 8 9 10 11 5. Install the bolts and tighten them to the speci- fied torque. EWB01910 EBU23940 Adjusting the carburetor The carburetor should be checked and, if neces- sary, adjusted at the intervals specified in the peri- odic maintenance and lubrication chart.
8-21 1 2 3 4 5 6 7 8 9 10 11 CAUTION: ECB00480 The carburetor has been set and extensively tested at the Yamaha factory. Changing these settings without sufficient technical knowl- edge may result in poor performance of or damage to the engine.
8-22 1 2 3 4 5 6 7 8 9 10 11 EBU24043 Adjusting the throttle cable free play The throttle cable free play should be checked and, if necessary, adjusted at the intervals speci- fied in the periodic maintenance and lubrication chart. The throttle cable free play should measure 2.
8-23 1 2 3 4 5 6 7 8 9 10 11 EBU24130 Checking the front and rear brake pads The front and rear brake pads must be checked for wear at the intervals specified in the periodic main- tenance and lubrication chart.
8-24 1 2 3 4 5 6 7 8 9 10 11 place the brake pads as a set. EBU28930 Checking the brake fluid level Insufficient brake fluid may allow air to enter the brake system, possibly causing it to become inef- fective. Before riding, check that the brake fluid is above the minimum level mark and replenish if neces- sary.
8-25 1 2 3 4 5 6 7 8 9 10 11 Rear brake If the rear brake fluid level is low, replenish as fol- lows. 1. Remove the brake fluid reservoir cap cover by removing the bolt.
8-26 1 2 3 4 5 6 7 8 9 10 11 3. Refill with brake fluid. 4. Install the brake fluid reservoir cap. 5. Install the brake fluid reservoir cap cover by installing the bolt. Observe these precautions: ● When checking the fluid level, make sure that the top of the brake fluid reservoir is level.
8-27 1 2 3 4 5 6 7 8 9 10 11 EBU24380 Checking the front brake lever free play The brake lever free play must be checked at the intervals specified in the periodic maintenance and lubrication chart. The brake lever should have a free play of zero mm (zero in) as shown.
8-28 1 2 3 4 5 6 7 8 9 10 11 EWB02060 EBU24700 Adjusting the parking brake free play The parking brake free play must be checked and, if necessary, adjusted at the intervals specified in the periodic maintenance and lubrication chart. Cable length “ A ” should measure 64 – 68 mm (2.
8-29 1 2 3 4 5 6 7 8 9 10 11 1. Release the parking brake by moving the parking brake lever to the right. 2. Fully loosen the locknut and the adjusting bolt at the rear brake caliper.
8-30 1 2 3 4 5 6 7 8 9 10 11 together with the locknut. EWB02030 EBU24740 Brake light switches The operation of the brake light switches must be checked and, if necessary, adjusted at the inter- vals specified in the periodic maintenance and lu- brication chart.
8-31 1 2 3 4 5 6 7 8 9 10 11 EBU24810 Adjusting the clutch lever free play The clutch lever free play must be checked and, if necessary, adjusted at the intervals specified in the periodic maintenance and lubrication chart. The clutch lever free play should measure 5.
8-32 1 2 3 4 5 6 7 8 9 10 11 EBU26861 Drive chain slack The drive chain slack should be checked before each ride and adjusted if necessary. To check the drive chain slack 1. Place the ATV on a level surface. NO TE: When checking and adjusting the drive chain slack, there should be no weight on the ATV and all tires must be touching the ground.
8-33 1 2 3 4 5 6 7 8 9 10 11 NO TE: A rod can be obtained at a Yamaha dealer to make this adjustment. 3. Shift the transmission into neutral. 4. To tighten the drive chain, push the ATV back- ward.
8-34 1 2 3 4 5 6 7 8 9 10 11 and lubrication chart, otherwise it will quickly wear out, especially when riding in dusty or wet areas. Service the drive chain as follows. CAUTION: ECB00560 The drive chain must be lubricated after wash- ing the ATV or riding in the rain.
8-35 1 2 3 4 5 6 7 8 9 10 11 EWB02120 EBU24921 Checking and lubricating the brake and clutch levers The operation of the brake and clutch levers should be checked before each ride, and the lever pivots should be lubricated if necessary. Brake lever W ARNING POTENTIAL HAZARD Damaged control cables.
8-36 1 2 3 4 5 6 7 8 9 10 11 Clutch lever EBU24931 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.
8-37 1 2 3 4 5 6 7 8 9 10 11 EBU25030 Lubricating the upper and lower arm pivots The upper and lower arm pivots must be lubricated at the intervals specified in the periodic mainte- nance and lubrication chart. Lubricate the pivoting points using a grease gun.
8-38 1 2 3 4 5 6 7 8 9 10 11 Right side EBU25100 Lubricating the steering shaft The steering shaft must be lubricated at the inter- vals specified in the periodic maintenance and lu- brication chart. EBU25212 Battery This model is equipped with a sealed-type (MF) battery, which does not require any maintenance.
8-39 1 2 3 4 5 6 7 8 9 10 11 EWB02140 To charge the battery Have a Yamaha dealer charge the battery as soon as possible if it seems to have discharged. Keep in mind that the battery tends to discharge more quickly if the ATV is equipped with optional electri- cal accessories.
8-40 1 2 3 4 5 6 7 8 9 10 11 ● To charge a sealed-type (MF) battery, a spe- cial constant-voltage battery charger is re- quired. Using a conventional battery charger will damage the battery. If you do not have access to a constant-voltage battery charg- er, have a Yamaha dealer charge your bat- tery.
8-41 1 2 3 4 5 6 7 8 9 10 11 If the fuse is blown, replace it as follows. 1. Turn the key to “ OFF ” and turn off all electrical circuits. CAUTION: ECB00640 To prevent accidental short-circuiting, turn off the main switch when checking or replacing a fuse.
8-42 1 2 3 4 5 6 7 8 9 10 11 EBU25430 Replacing a headlight bulb If a headlight bulb burns out, replace it as follows. 1. Remove the headlight unit by removing the bolts. 2. Disconnect the headlight coupler. 3. Remove the headlight bulb holder cover. 4.
8-43 1 2 3 4 5 6 7 8 9 10 11 EWB02180 5. Place a new headlight bulb into position. CAUTION: ECB00650 Do not touch the glass part of the 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 adversely affect- ed.
8-44 1 2 3 4 5 6 7 8 9 10 11 8. Connect the headlight coupler. 9. Install the headlight unit by installing the bolts. 10. Adjust the headlight beam if necessary. EBU25550 Adjusting a headlight beam CAUTION: ECB00690 It is advisable to have a Yamaha dealer make this adjustment.
8-45 1 2 3 4 5 6 7 8 9 10 11 Rear 2. Elevate the ATV and place a suitable stand under the frame. 3. Remove the nuts from the wheel. 4. Remove the wheel. EBU25670 Installing a wheel 1. Install the wheel and the nuts. NO TE: When installing a front wheel, make sure its arrow mark points toward the rotating direction of the wheel.
8-46 1 2 3 4 5 6 7 8 9 10 11 spection before shipment from the factory, trouble may occur during operation. Any problem in the fu- el, compression, or ignition systems, for example, can cause poor starting and loss of power. The following troubleshooting chart represents a quick and easy procedure for checking these vital systems yourself.
8-47 1 2 3 4 5 6 7 8 9 10 11 EBU25751 Troubleshooting chart Check the fuel level in the fuel tank. 1. Fuel There is enough fuel. There is no fuel. Check the compression. Supply fuel. The engine does not start. Check the compression. Operate the electric starter.
9-1 1 2 3 4 5 6 7 8 9 10 11 EBU25860 CLEANING AND STORAGE EBU25890 Cleaning Frequent, thorough cleaning of your ATV will not only enhance its appearance but will improve its general performance and extend the useful life of many components. 1. Before cleaning the ATV: a.
9-2 1 2 3 4 5 6 7 8 9 10 11 EWB02300 EBU25932 Storage Short-term Always store your ATV in a cool, dry place and, if necessary, protect it against dust with a porous cover. CAUTION: ECB00720 ● Storing the ATV in a poorly ventilated room or covering it with a tarp while it is still wet, will allow water and humidity to seep in and cause rust.
9-3 1 2 3 4 5 6 7 8 9 10 11 plug, and then place the spark plug on the cylinder head so that the electrodes are grounded. (This will limit sparking during the next step.) d. Turn the engine over several times with the starter. (This will coat the cylinder wall with oil.
10-1 1 2 3 4 5 6 7 8 9 10 11 EBU25960 SPECIFICATIONS EBU2597A Dimensions: Overall length: 1625 mm (64.0 in) Overall width: 1070 mm (42.1 in) Overall height: 1040 mm (40.9 in) Seat height: 730 mm (28.7 in) Wheelbase: 1110 mm (43.7 in) Ground clearance: 100 mm (3.
10-2 1 2 3 4 5 6 7 8 9 10 11 Engine oil quantity: Without oil filter element replacement: 1.25 L (1.32 US qt) (1.10 Imp.qt) With oil filter element replacement: 1.35 L (1.43 US qt) (1.19 Imp.qt) Air filter: Air filter element: Wet element Fuel: Recommended fuel: Unleaded gasoline only Fuel tank capacity: 9.
10-3 1 2 3 4 5 6 7 8 9 10 11 Front tire: Type: Tubeless Size: AT20 x 7-10 Manufacturer/model: DUNLOP/KT201 Rear tire: Type: Tubeless Size: AT19 x 10-9 Manufacturer/model: DUNLOP/KT205A Loading: Maximum loading limit: 100.
10-4 1 2 3 4 5 6 7 8 9 10 11 Front suspension: Type: Double wishbone Spring/shock absorber type: Coil spring/oil damper Wheel travel: 190 mm (7.5 in) Rear suspension: Type: Swingarm Spring/shock absorber type: Coil spring/gas-oil damper Wheel travel: 200 mm (7.
11-1 1 2 3 4 5 6 7 8 9 10 11 EBU25981 CONSUMER INFORMATION EBU26011 Identification numbers Record the key identification number, vehicle iden- tification number and model label information in the spaces provided below for assistance when or- dering spare parts from a Yamaha dealer or for ref- erence in case the ATV is stolen.
11-2 1 2 3 4 5 6 7 8 9 10 11 NO TE: The vehicle identification number is used to identi- fy your ATV. EBU26050 Model label The model label is affixed at the location in the il- lustration. Record the information on this label in the space provided. This information will be need- ed when ordering spare parts from a Yamaha deal- er.
11-3 1 2 3 4 5 6 7 8 9 10 11 EBU26060 Noise regulation TAMPERING WITH NOISE CONTROL SYSTEM PROHIBITED: Federal law prohibits the following acts or the causing thereof: (1) The removal or rendering ino.
11-4 1 2 3 4 5 6 7 8 9 10 11 EBU26080 Maintenance record Copies of work orders and/or receipts for parts you purchase and install will be required to document main- tenance done in accordance with the warranty. The chart below is printed only as a reminder to you that the maintenance work is required.
11-5 1 2 3 4 5 6 7 8 9 10 11 EBU26501 YAMAHA MOTOR CORPORATION, U.S.A. ATV LIMITED WARRANTY Y amaha Motor Cor poration, U .S.A. hereby w arrants that new Y amaha A TVs purchased from an authorized Y a.
11-6 1 2 3 4 5 6 7 8 9 10 11 W ARRANTY QUESTIONS AND ANSWERS Q. What costs are my responsibility during the warranty period? A. The customer ’ s responsibility includes all costs of normal maintenance services, non-warranty repairs, accident and collision damages , and oil, oil filters, air filters, spark plugs, and brake shoes .
11-7 1 2 3 4 5 6 7 8 9 10 11 EBU26122 YAMAHA EXTENDED SERVICE (Y.E.S.) K eep your Y amaha protected ev en after your warr anty expires with gen uine Y amaha Extended Ser vice (Y .E.S.). Y .E.S. is designed and administered by Y amaha Motor Corporation to provide maximum owner satisf action.
11-8 1 2 3 4 5 6 7 8 9 10 11 We urge y ou to act now . Y ou ’ ll get the excellent benefits of TRIP cov erage right awa y , and you ’ ll rest easy knowing you ’ ll ha ve strong f actory-backed protection e ven after y our Y amaha Limited W arranty expires.
11-9 1 2 3 4 5 6 7 8 9 10 11 EBU26132.
INDEX A Accessories and loading ................................................ 6-7 Air filter element, cleaning ............................................ 8-15 B Battery .......................................................................... 8-38 Brake and clutch levers, checking and lubricating .
Light switch .................................................................... 4-3 M Main switch .................................................................... 4-1 Maintenance and lubrication chart ................................. 8-5 Maintenance chart, emission control system .
.
PRINTED IN JAP AN 2007.05-1.8x1 ! (E) Y AMAHA MOT OR CO. , L TD. PRINTED ON RECYCLED PAPER LOCATE AND READ OWNER ’ S MANUAL. FOLLOW ALL INSTRUCTIONS AND WARNINGS. (For replacement manual, call 1-800-532-1558) WARNING ALWAYS : use proper riding techniques to avoid vehicle overturns on hills and rough terrain and in turns.
Dear New Y amaha A TV Owner: CONGRA TULA TIONS ON THE PURCHASE OF YOUR NEW Y AMAHA A TV . Y ou have purchased a quality Y amaha pr oduct that , with proper use and care , will pro vide hours of riding pleasure.
NO POST AGE NECESSARY IF MAILED IN THE UNITED ST A TES FIRST CLASS PERMIT NO. 4 CYPRESS, CA POST AGE WILL BE P AID BY ADDRESSEE Y AMAHA MOTOR CORPORA TION U.
An important point after buying a device Yamaha YFM25RX (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Yamaha YFM25RX yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Yamaha YFM25RX - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Yamaha YFM25RX you will learn all the available features of the product, as well as information on its operation. The information that you get Yamaha YFM25RX will certainly help you make a decision on the purchase.
If you already are a holder of Yamaha YFM25RX, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Yamaha YFM25RX.
However, one of the most important roles played by the user manual is to help in solving problems with Yamaha YFM25RX. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Yamaha YFM25RX along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
