Yamaha YFM125GZ Owner's Manual

This AThis ATV should not be ridden by anyone under 16 years of age.OWNER’S MANUALLIT-11626-23-131C5-28199-16YFM125GZWARNINGREAD THIS MANUAL CAREFUL

1-2 1234567891011 EBU17670 Read and understand all of the labels on your ATV. These labels contain important information for safe andproper operation

8-34 1234567891011 the hub stopper bolt.3. Loosen the axle holding bolts.4. Loosen the chain adjusting bolt locknut. Totighten the drive chain, turn

8-35 1234567891011NOTICE ECB00550 If measurement “A” of the drive chain adjust-ing bolt is less than 27 mm (1.06 in), have a Yamaha dealer replace t

8-36 1234567891011NOTICE ECB00560 The drive chain must be lubricated after wash- ing the ATV or riding in the rain. 1. Clean the drive chain with ke

8-37 1234567891011Front brake leverRear brake lever EBU24962 Checking the wheel hub bearings The front and rear wheel hub bearings must bechecked at

8-38 1234567891011Left side Right side EBU28822 Lubricating the front knuckle pivots The front knuckle pivots must be lubricated at theintervals spe

8-39 1234567891011 EBU25090 Lubricating the steering shaft The steering shaft must be lubricated at the inter-vals specified in the periodic mainten

8-40 1234567891011TIP The electrolyte should be between the minimum and maximum level marks.3. If the electrolyte is at or below the minimumlevel mar

8-41 1234567891011 EYES: Flush with water for 15 minutes and getprompt medical attention.Batteries produce explosive gases. Keepsparks, flame, cigare

8-42 1234567891011 To install the batteryTIP Be sure the battery is fully charged.1. Install the battery.2. Connect the positive lead first, and then

8-43 1234567891011 EBU25263 Replacing the fuse The fuse holder is located on the right side of theATV.If the fuse is blown, replace it as follows.1.

1-3 123456789101112345LOAD LIMIT3LD-24877-U011 Ibs. ( 5 kg)WARNINGNEVER sit here.3MX-24875-A0WARNINGNEVER sit here.3MX-24875-A0LOAD LIMIT1C5-24877

8-44 1234567891011 2. Remove the headlight bulb holder cover bypulling it off. 3. Remove the headlight bulb holder by pushingit in and turning it cou

8-45 1234567891011 6. Install the bulb holder by pushing it in and turn-ing it clockwise.7. Install the bulb holder cover and the cover atthe rear of

8-46 1234567891011 follows.1. Remove the bulb holder (together with thebulb) by turning it counterclockwise.2. Remove the burnt-out bulb by pushing i

8-47 1234567891011 3. Elevate the ATV and place a suitable standunder the frame.4. Remove the nuts from the wheel.5. Remove the wheel. EBU25692 Insta

8-48 1234567891011 EBU25720 Troubleshooting Although Yamaha ATVs receive a thorough in-spection before shipment from the factory, troublemay occur d

8-49 1234567891011 EBU25791 Troubleshooting chart Check the fuel level inthe fuel tank.1. FuelThere is enough fuel.There is no fuel.Check the compres

9-1 1234567891011 EBU25860 CLEANING AND STORAGE EBU25902 Cleaning Frequent, thorough cleaning of your ATV will notonly enhance its appearance but wi

9-2 1234567891011 EBU25933 Storage Short-term Always store your ATV in a cool, dry place and, ifnecessary, protect it against dust with a porouscove

9-3 1234567891011 ly, turn the wheels a little every month in orderto prevent the tires from becoming degradedin one spot.8. Cover the muffler outlet

10-1 1234567891011 EBU25960 SPECIFICATIONS EBU2597E Dimensions: Overall length: 1700 mm (66.9 in)Overall width: 990 mm (39.0 in)Overall height: 980

1-4 123456789101178910Read owner's manual carefullybefore operating.When shifting the drive select lever,always be sure

10-2 1234567891011Transmission oil: Quantity: 0.6 L (0.63 US qt, 0.53 Imp.qt) Air filter: Air filter element: Wet element Fuel: Recommended fuel: Unl

10-3 1234567891011Loading: Maximum loading limit: 105.0 kg (231 lb)(Total weight of rider, cargo, accessories, and tongue) Tire air pressure (measure

10-4 1234567891011Headlight: Bulb type: Krypton bulb Bulb voltage, wattage ×××× quantity: Headlight: 12 V, 30/30 W × 2Tail/brake light: 12 V,

11-1 1234567891011 EBU25981 CONSUMER INFORMATION EBU26012 Identification numbers Record the key identification number, vehicle iden-tification numbe

11-2 1234567891011TIP The vehicle identification number is used to identi- fy your ATV. EBU26050 Model label The model label is affixed at the locat

11-3 1234567891011 1. Vehicle Emission Control Information label1✤✰✬✤✩ ✦  

11-4 1234567891011 EBU26060 Noise regulation TAMPERING WITH NOISE CONTROL SYSTEM PROHIBITED: Federal law prohibits the following acts or the causing

11-5 1234567891011 EBU26080 Maintenance record Copies of work orders and/or receipts for parts you purchase and install will be required to document

11-6 1234567891011 EBU26501 YAMAHA MOTOR CORPORATION, U.S.A. ATV LIMITED WARRANTY Yamaha Motor Corporation, U.S.A. hereby warrants that new Yamaha AT

11-7 1234567891011WARRANTY QUESTIONS AND ANSWERSQ. What costs are my responsibility during the warranty period?A. The customer’s responsibility inclu

2-1 1234567891011 EBU17431SAFETY INFORMATION SAFETY INFORMATION EBU17445 AN ATV IS NOT A TOY AND CAN BE HAZARD-OUS TO OPERATE. An ATV handles differ

11-8 1234567891011 EBU26123 YAMAHA EXTENDED SERVICE (Y.E.S.) Keep your Yamaha protected even after your warranty expires with genuine Yamaha Extended

11-9 1234567891011We urge you to act now. You’ll get the excellent benefits of TRIP coverage right away, and you’ll rest easy knowing you’ll have str

11-10 1234567891011 EBU26132✤✰✬✤✩ ✤✣  

INDEX A Accessories and loading ... 6-6Air filter elements, engine and V-belt filter cleaning ... 8-15

M Main switch ... 4-1Maintenance and lubrication chart ...

PRINTED IN JAPAN2009.03-0.4x1 !(E)YAMAHA MOTOR CO., LTD.PRINTED ON RECYCLED PAPERLOCATE AND READ OWNER’S MANUAL. FOLLOW ALL INSTRUCTIONS AND WARNIN

Dear New Yamaha ATV Owner:CONGRATULATIONS ON THE PURCHASE OF YOUR NEW YAMAHA ATV. You have purchased a qualityYamaha product that, with proper use and

NO POSTAGENECESSARYIF MAILEDIN THEUNITED STATESFIRST CLASS PERMIT NO. 4CYPRESS, CAPOSTAGE WILL BE PAID BY ADDRESSEEYAMAHA MOTOR CORPORATION U.S.A.P.O

2-2 1234567891011 ● Never attempt wheelies, jumps, or other stunts. ● Always inspect your ATV each time you use it tomake sure it is in safe operatin

2-3 1234567891011 backwards, follow the special procedure forbraking described in this manual. Dismount onthe uphill side or to a side if pointed str

2-4 1234567891011 monoxide can linger for hours or days in en-closed or poorly ventilated areas. If you experi-ence any symptoms of carbon monoxidepo

3-1 1234567891011 EBU17680 DESCRIPTION EBU17690 Left view EBU17700 Right view 1. Front carrier2. Starter (choke)3. Fuel cock4. Tail/brake light5. Re

3-2 1234567891011 EBU17712 Controls and instrumentsTIP The ATV you have purchased may differ slightly from the figures shown in this manual. 1. Rear

4-1 1234567891011 EBU17725 INSTRUMENT AND CONTROL FUNCTIONSWARNING EWB00011 Indicates a hazardous situation which, if notavoided, could result in de

EBU17092 Read this manual carefully before operating this vehicle. This manual should stay with this ve-hicle if it is sold.✤✰✬✤✩ ✤  

4-2 1234567891011 EBU17792 Indicator lights EBU17830 Reverse indicator light “” This indicator light comes on when the transmis-sion is in the reve

4-3 1234567891011 EBU18101 Start switch “” Push this switch to crank the engine with the start-er. See the starting instructions on page 6-1 priorto

4-4 1234567891011 pushed to the maximum.1. Loosen the locknut.2. To increase the maximum engine power avail-able and the maximum speed of the ATV, tu

4-5 1234567891011 EBU18401 Rear brake lever The rear brake lever is located on the left handle-bar. To apply the rear brake, pull the brake lever to

4-6 1234567891011WARNING EWB00220 ● Always set the parking brake before startingthe engine. The ATV could start moving un-expectedly if the parking

4-7 1234567891011 EBU18720 Fuel tank cap Remove the fuel tank cap by turning it counter-clockwise. EBU18731 Fuel Make sure there is sufficient gaso

4-8 1234567891011 3. Wipe up any spilled fuel immediately. NOTICE: Immediately wipe off spilled fuelwith a clean, dry, soft cloth, since fuel maydet

4-9 1234567891011 buretor while also filtering it.The fuel cock lever positions are explained as fol-lows and shown in the illustrations. OFF With th

4-10 1234567891011 RES This indicates reserve. With the fuel cock lever inthis position, the fuel reserve is made available.Turn the fuel cock lever

4-11 1234567891011 To install the seat Insert the projections on the front of the seat intothe seat holders and push down on the seat at therear. Mak

EBU17170 INTRODUCTION EBU17272 Congratulations on your purchase of the Yamaha YFM125GZ. This ATV represents the result of manyyears of Yamaha experie

4-12 1234567891011WARNING EWB00011 Indicates a hazardous situation which, if notavoided, could result in death or serious injury.✤✰✬✤✩ ✤✥  

5-1 1234567891011 EBU19201 PRE-OPERATION CHECKS EBU19224 Inspect your vehicle each time you use it to make sure the vehicle is in safe operating cond

5-2 1234567891011 Throttle lever ● Make sure that operation is smooth. Lubricate cable and lever hous-ing if necessary. ● Check cable free play, and

5-3 1234567891011 EBU19541 Fuel Make sure that there is sufficient fuel in the tank.(See page 4-7.) EBU19560 Engine oil Make sure that the engine o

5-4 1234567891011 pressures must be equal on both sides. WARNING! Operation of this vehicle with im-proper tire pressure may cause severe injuryor de

5-5 1234567891011 Tire information This ATV is equipped with tubeless tires withvalves.WARNING EWB02551 Use of improper tires on this ATV may causel

5-6 1234567891011 EBU19850 Instruments, lights and switches Check that all instruments, lights and switches areworking properly. Correct if necessar

6-1 1234567891011 EBU19872 OPERATIONWARNING EWB00011 Indicates a hazardous situation which, if notavoided, could result in death or serious injury.

6-2 1234567891011Ambient temp./starter (choke) position 6. Completely close the throttle lever and startthe engine by pushing the start switch. NOTIC

6-3 1234567891011 EBU20361 Operating the drive select lever and driving in reverse NOTICE ECB00170 Before shifting, stop the ATV, otherwise the tran

EBU17330 IMPORTANT MANUAL INFORMATION EBU17342 FAILURE TO FOLLOW THE WARNINGS CONTAINED IN THIS MANUAL CAN RESULT IN SERIOUS IN-JURY OR DEATH.Particu

6-4 1234567891011 go slowly. 1. Bring the ATV to a complete stop.2. Apply the parking brake.3. Shift from neutral to reverse and vice versa bymoving

6-5 1234567891011 320 km (200 mi) or 20 hours and beyond The ATV can now be operated normally.NOTICE ECB00220 If any engine trouble should occur dur

6-6 1234567891011 EBU20910 Accessories and loading EBU20921 Genuine Yamaha Accessories Choosing accessories for your ATV is an importantdecision. Ge

6-7 1234567891011 ples include (but are not limited to) a heavy orbulky object attached to the handlebars whichcould make steering difficult, an acce

6-8 1234567891011 ● Allow more braking distance. A heavier ATVtakes longer to stop. ● Avoid making sharp turns unless at very slowspeeds. ● Avoid hil

7-1 1234567891011 EBU21132 RIDING YOUR ATV ✤✰✬✤✩ ✤  

7-2 1234567891011WARNING EWB00011 Indicates a hazardous situation which, if notavoided, could result in death or serious injury. EBU21294 GETTING TO

7-3 1234567891011 information about the training course, contact anauthorized ATV dealer or call 1-800-887-2887. Riding your ATV requires skills acqu

7-4 1234567891011 Apparel Always wear the following to reduce risk of injury inan accident: ● Approved motorcycle helmet that fits properly ● Eye pro

7-5 1234567891011 Do not operate after or while consuming alco-hol or drugs. The operator’s performance capability is reducedby the influence of alco

EBU17350 IMPORTANT NOTICE EBU17362 This ATV is designed and manufactured for off-road use only. It is illegal and unsafe to operate this ATV onany pu

7-6 1234567891011 the maximum. Turning in the adjusting screw limitsthe maximum engine power available and de-creases the maximum speed of the ATV. T

7-7 1234567891011 Drive more slowly than you would without a load.The more weight you carry, the slower you shouldgo. Although conditions vary, it is

7-8 1234567891011 Modifications and accessories Never modify this ATV through improper installa-tion or use of accessories or other modification. All

7-9 1234567891011 children are not likely to touch it. BE CAREFUL WHERE YOU RIDE This ATV is designed for off-road use only. WARNING! Paved surfaces

7-10 1234567891011 Know the terrain where you ride. Ride cautiously inunfamiliar areas. Stay alert for holes, rocks, orroots in the terrain, and othe

7-11 1234567891011 When riding in an area where you might not easilybe seen, such as desert terrain, mount a cautionflag on the ATV. DO NOT use the f

7-12 1234567891011 Select a large, flat area off-road to become familiarwith your ATV. Make sure that this area is free ofobstacles and other riders.

7-13 1234567891011 As you approach a curve, slow down and begin toturn the handlebars in the desired direction. As youdo so, put your weight on the f

7-14 1234567891011 ● Never operate the ATV on hills too steep forthe ATV or for your abilities. The ATV canoverturn more easily on extremely steep hi

7-15 1234567891011 Do not attempt to climb hills until you have mas-tered basic maneuvers on flat ground. Alwayscheck the terrain carefully before at

WARNING EWB00011 Indicates a hazardous situation which, if notavoided, could result in death or serious injury. EBU17420 TABLE OF CONTENTS LOCATION O

7-16 1234567891011 RIDING DOWNHILLWARNING EWB01131 Going down a hill improperly could causeoverturns or loss of control. Always followproper procedu

7-17 1234567891011 CROSSING A SLOPEWARNING EWB01632 Improperly crossing hills or turning on hillscould cause loss of control or cause the ATV toover

7-18 1234567891011 CROSSING THROUGH SHALLOW WATERWARNING EWB01641 Operating this vehicle through deep or fast-flowing water can lead to loss of cont

7-19 1234567891011 After riding your ATV in water, be sure to drain thetrapped water by removing the check hose at thebottom of the air filter case.

7-20 1234567891011 RIDING OVER ROUGH TERRAINWARNING EWB01651 Riding improperly over obstacles could causeloss of control or a collision. Before oper

7-21 1234567891011 ways, control can usually be regained (if there isroom to do so) by steering in the direction of theslide. Applying the brakes or

7-22 1234567891011 (See page 7-13.) ● If your ATV is traversing a sloping surface:Be sure to ride with your weight positioned to-wards the uphill sid

8-1 1234567891011 EBU2164A PERIODIC MAINTENANCE AND ADJUSTMENT EBU21671 Periodic inspection, adjustment, and lubricationwill keep your vehicle in the

8-2 1234567891011 The service information included in this manualand the tools provided in the owner’s tool kit are in-tended to assist you in the pe

8-3 1234567891011 EBU21743 Periodic maintenance chart for the emission control system TIP ● For ATVs not equipped with an odometer or an hour meter,

Parking ... 6-5Parking on a slope ... 6-5Accessories and loadi

8-4 1234567891011 6 * Exhaust system ● Check for leakage and replace gasket(s) if neces-sary. ● Check for looseness and tighten all screw clamps and

8-5 1234567891011 EBU21864 General maintenance and lubrication chart NO. ITEMCHECK OR MAINTENANCE JOBINITIAL EVERYWhichev-er comes firstmonth 136612k

8-6 1234567891011 8 Drive chain ● Check chain slack and adjust if necessary. ● Check rear wheel alignment and correct if neces-sary. ● Clean and lubr

8-7 1234567891011 EBU23061TIP Some maintenance items need more frequent service if you are riding in unusually wet, dusty, sandy or muddy areas, or a

8-8 1234567891011WARNING EWB00011 Indicates a hazardous situation which, if notavoided, could result in death or serious injury. EBU23211 Checking t

8-9 1234567891011 To check the spark plug 1. Check that the porcelain insulator around thecenter electrode of the spark plug is a medi-um-to-light ta

8-10 1234567891011 2. Clean the surface of the spark plug gasketand its mating surface, and then wipe off anygrime from the spark plug threads.3. Ins

8-11 1234567891011 4. Insert the dipstick into the filler hole (withoutscrewing it in), and then remove it again tocheck the oil level.TIP The engine

8-12 1234567891011 5. Clean the oil strainer with solvent.6. Check the O-ring for damage and replace it ifnecessary.7. Install the O-ring, oil strain

8-13 1234567891011 is leaking, immediately turn the engine off andcheck for the cause.10. Turn the engine off, wait at least ten minutes,and then che

Adjusting a headlight beam ... 8-45Replacing the tail/brake light bulb ... 8-45Removing a wheel ...

8-14 1234567891011 5. Pour the recommended type of oil in the trans-mission oil filler hole until it flows out of thecheck screw hole.6. Install the

8-15 1234567891011 6. Refill with the specified amount of the recom-mended transmission oil, and then install andtighten the oil filler bolt. NOTICE

8-16 1234567891011 1. Place the ATV on a level surface.2. Remove the seat. (See page 4-10.)3. Remove the breather hose, and then loosenthe clamp scre

8-17 1234567891011 5. Pull the air filter element out of the air filtercase.6. Remove the bolt and washer shown, and thenpull the sponge material off

8-18 1234567891011 9. Check the sponge material and replace it ifdamaged.10. Apply Yamaha foam air filter oil or other qual-ity foam air filter oil t

8-19 1234567891011 15. Install the breather hose and then tighten theclamp screw.16. Install the seat.TIP The air filter element should be cleaned ev

8-20 1234567891011 4. Disconnect the coupler shown. 5. Remove the air filter case cover by removingthe screw. 1. Panel2. Quick fastener1221 1. Panel2

8-21 1234567891011 6. Remove the air filter element.7. Tap the air filter element lightly to removemost of the dust and dirt. Blow out the remain-ing

8-22 1234567891011 8. Check the air filter element and replace it ifdamaged.9. Install the air filter element into the air filtercase.10. Install the

8-23 1234567891011 4. Insert the tailpipe into the muffler and align thescrew holes.5. Install the screws and tighten them.WARNING EWB02340 Do not s

1-1 1234567891011 EBU17660 LOCATION OF THE WARNING AND SPECIFICATION LABELS 12654398710✤✰✬✤✩ ✤  

8-24 1234567891011 EBU23940 Adjusting the carburetor The carburetor should be checked and, if neces-sary, adjusted at the intervals specified in the

8-25 1234567891011TIP If the specified idling speed cannot be obtained asdescribed above, have a Yamaha dealer make the adjustment. EBU24045 Adjustin

8-26 1234567891011 4. Tighten the locknut.5. Slide the rubber cover to its original position. EBU24060 Valve clearance The valve clearance changes w

8-27 1234567891011Front brake Rear brake EBU24371 Adjusting the front brake lever free play The brake lever free play must be checked and, ifnecessa

8-28 1234567891011 The brake lever free play should measure 5.0–8.0mm (0.20–0.31 in) as shown. If the free play is in-correct, adjust it as follows.1

8-29 1234567891011 3. Remove the V-belt air filter element cover byremoving the screw. 1. Panel2. Quick fastener1221 1. Panel2. Coupler12✤✰✬✤✩ ✥✬

8-30 1234567891011 4. Loosen the locknut and fully turn in the adjust-ing bolt at the brake lever.5. Make sure the brake cable joint in the equaliz-e

8-31 1234567891011 6. Tighten the locknut on each brake cable.7. Turn the adjusting bolt in direction (a) to in-crease the free play, and in directio

8-32 1234567891011 8. Tighten the locknut at the brake lever.9. Install the V-belt air filter element cover by in-stalling the screw.10. Connect the

8-33 1234567891011 EBU24873 Drive chain slack The drive chain slack should be checked beforeeach ride and adjusted if necessary. To check the drive