Yamaha YFM40FBX User Manual

READ THIS MANUAL CAREFULLY!

It contains important safety information.

OWNER’S MANUAL

YFM40FBX

WARNING

This ATV should not be ridden by anyone under 16 years of age.

LIT-11626-21-20

4S1-F8199-11

EBU17091

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INTRODUCTION

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Congratulations on your purchase of the Yamaha YFM40FBX. This ATV represents the result of many years of Yamaha experience in the production of fine sporting, touring, and pace-setting racing machines. With the purchase of this Yamaha, you can now appreciate the high degree of craftsmanship and reliability that have made Yamaha a leader in these fields.

This manual will provide you with a good basic understanding of the features and operation of this ATV.

This manual includes important safety information. It provides information about special techniques and skills necessary to ride the ATV. It also includes basic maintenance and inspection procedures. If you have any questions regarding the operation or maintenance of your ATV, please consult a Yamaha dealer.

AN IMPORTANT SAFETY MESSAGE:

●READ THIS MANUAL TOGETHER WITH TIPS FOR THE ATV RIDER CAREFULLY AND COMPLETELY BEFORE OPERATING YOUR ATV. MAKE SURE YOU UNDERSTAND ALL INSTRUCTIONS.

●PAY CLOSE ATTENTION TO THE WARNING AND CAUTION LABELS ON THE ATV.

●NEVER OPERATE AN ATV WITHOUT PROPER TRAINING OR INSTRUCTION. FREE TRAINING IS AVAILABLE TO ANYONE WHO BUYS A NEW ATV. CALL 1-800-887-2887 FOR MORE INFORMATION.

●THIS ATV, AND ANY OTHER ATV OVER 90 cc, SHOULD NOT BE RIDDEN BY ANYONE UNDER 16 YEARS OF AGE.

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IMPORTANT MANUAL INFORMATION

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FAILURE TO FOLLOW THE WARNINGS CONTAINED IN THIS MANUAL CAN RESULT IN SERIOUS INJURY OR DEATH.

Particularly important information is distinguished in this manual by the following notations:

The Safety Alert Symbol means ATTENTION! BECOME ALERT! YOUR

SAFETY IS INVOLVED!

				Failure to follow WARNING instructions could result in severe injury
	WARNING			or death to the ATV operator, a bystander, or a person inspecting or
				repairing the ATV.
				A CAUTION indicates special precautions that must be taken to avoid
	CAUTION:
				damage to the ATV.
	NOTE:			A NOTE provides key information to make procedures easier or clearer.

* Product and specifications are subject to change without notice.

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IMPORTANT NOTICE

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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.

This ATV complies with all applicable OFF-ROAD noise level and spark arrester laws and regulations in effect at the time of manufacture.

Please check your local riding laws and regulations before operating this ATV.

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		YFM40FBX
		OWNER’S MANUAL
		©2007 by Yamaha Motor Corporation, U.S.A.
		1st edition, April 2007
AFFIX DEALER		All rights reserved.
		Any reprinting or unauthorized use
LABEL HERE		without the written permission of
		Yamaha Motor Corporation, U.S.A.
		is expressly prohibited.
		Printed in U.S.A.
		P/N LIT-11626-21-20

EWB00010

WARNING

Indicates a potential hazard that could result in serious injury or death.

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TABLE OF CONTENTS

SAFETY INFORMATION ..............................	1-1
LOCATION OF THE WARNING AND
SPECIFICATION LABELS ............................	2-1
DESCRIPTION ..............................................	3-1
Left view ......................................................	3-1
Right view....................................................	3-1
Controls and instruments ............................	3-2
INSTRUMENT AND
CONTROL FUNCTIONS................................	4-1
Main switch ................................................	4-1
Indicator lights and warning light ................	4-2
Speedometer ..............................................	4-3
Fuel gauge .................................................	4-4
Handlebar switches ....................................	4-5

Throttle lever .............................................	4-10
Speed limiter .............................................	4-11
Front brake lever .......................................	4-12
Brake pedal and rear brake lever .............	4-12
Parking brake ............................................	4-13
Shift pedal .................................................	4-14
Reverse knob “REV” .................................	4-14
Recoil starter .............................................	4-15
Fuel tank cap ............................................	4-16
Fuel ...........................................................	4-16
Fuel cock ..................................................	4-17
Starter (choke) ..........................................	4-19
Seat ..........................................................	4-19
Storage compartment ...............................	4-20
Front carrier ..............................................	4-21
Rear carrier ...............................................	4-21
Adjusting the front and
rear shock absorber assemblies .............	4-21
Auxiliary DC jack .......................................	4-23
PRE-OPERATION CHECKS ..........................	5-1
Pre-operation check list ..............................	5-1
Fuel .............................................................	5-3
Engine oil ....................................................	5-3
Final gear oil ...............................................	5-3
Differential gear oil ......................................	5-3
Front and rear brakes .................................	5-3

Throttle lever ..............................................	5-4
Tires ...........................................................	5-5
Measuring the tire pressure .......................	5-6
Tire wear limit .............................................	5-7
Chassis fasteners .......................................	5-7
Instruments, lights and switches ................	5-7
OPERATION ..................................................	6-1
Starting a cold engine ................................	6-1
Starting a warm engine ..............................	6-3
Operating the reverse knob and
driving in reverse ......................................	6-3
Shifting .......................................................	6-4
Engine break-in ..........................................	6-6
Parking .......................................................	6-7
Parking on a slope .....................................	6-8
Accessories and loading ............................	6-8
RIDING YOUR ATV ......................................	7-1
GETTING TO KNOW YOUR ATV...............	7-2
RIDE WITH CARE AND
GOOD JUDGEMENT................................	7-2
BE CAREFUL WHERE YOU RIDE...........	7-12
TURNING YOUR ATV ..............................	7-18
CLIMBING UPHILL ...................................	7-20
RIDING DOWNHILL..................................	7-24
CROSSING A SLOPE...............................	7-26

CROSSING THROUGH
SHALLOW WATER .................................	7-28
RIDING OVER ROUGH TERRAIN............	7-30
SLIDING AND SKIDDING .........................	7-30
WHAT TO DO IF........................................	7-31
WHAT TO DO............................................	7-31
PERIODIC MAINTENANCE AND
MINOR REPAIR .............................................	8-1
Owner’s manual and tool kit .......................	8-1
Periodic maintenance chart
for the emission control system ................	8-3
General maintenance and
lubrication chart ........................................	8-5
Checking the spark plug .............................	8-9
Engine oil and oil filter element .................	8-11
Final gear oil .............................................	8-15
Differential gear oil ....................................	8-17
Cleaning the air filter element ...................	8-20
Cleaning the spark arrester ......................	8-23
Adjusting the carburetor ............................	8-24
Adjusting the engine idling speed .............	8-25
Adjusting the throttle cable free play .........	8-26
Valve clearance ........................................	8-26
Adjusting the reverse lock
release cable ..........................................	8-27

Checking the front brake pads and
rear brake friction plates .........................	8-27
Checking the brake fluid level ..................	8-28
Changing the brake fluid ..........................	8-29
Checking the front brake lever
free play .................................................	8-29
Adjusting the brake pedal and
rear brake lever free play .......................	8-30
Axle boots ................................................	8-34
Brake light switches .................................	8-35
Adjusting the clutch free play ...................	8-35
Checking and lubricating the cables ........	8-36
Checking and lubricating the front and
rear brake levers ....................................	8-37
Checking and lubricating the brake and
shift pedals .............................................	8-38
Checking the wheel hub bearings ............	8-38
Lubricating the drive shaft
universal joint .........................................	8-38
Checking the stabilizer bushes ................	8-39
Lubricating the rear knuckle pivots ...........	8-39
Lubricating the steering shaft ...................	8-39
Battery ......................................................	8-40
Replacing a fuse ......................................	8-42
Replacing a headlight bulb .......................	8-43
Adjusting a headlight beam ......................	8-46
Replacing the tail/brake light bulb ............	8-47

Removing a wheel ....................................	8-48
Installing a wheel ......................................	8-49
Troubleshooting ........................................	8-50
Troubleshooting chart ...............................	8-52
CLEANING AND STORAGE ..........................	9-1
Cleaning ......................................................	9-1
Storage .......................................................	9-2
SPECIFICATIONS .......................................	10-1
CONSUMER INFORMATION.......................	11-1
Identification numbers ...............................	11-1
Noise regulation ........................................	11-3
Maintenance record ..................................	11-4
YAMAHA MOTOR CORPORATION,
U.S.A. ATV LIMITED WARRANTY .........	11-5
YAMAHA EXTENDED SERVICE
(Y.E.S.) ...................................................	11-7

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SAFETY INFORMATION
		1

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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 precautions.

SEVERE INJURY OR DEATH can result if you do not follow these instructions:

●Read this manual and all labels carefully and follow the operating procedures described.

●Never operate an ATV without proper training or instruction. Take a Training Course. Beginners should receive training from a certified instructor. Contact an authorized ATV dealer or call 1- 800-887-2887 to find out about the training courses nearest you.

●Always follow the age recommendation:

– A child under 16 years old should never operate an ATV with engine size greater than 90 cc.

1-1

●Never allow a child under age 16 to operate an ATV without adult supervision, and never allow continued use of an ATV by a child if he or she does not have the abilities to operate it safely.

●Never carry a passenger on an ATV.

●Always avoid operating an ATV on any paved surfaces, including sidewalks, driveways, parking lots and streets.

●Never operate an ATV on any public street, road or highway, even a dirt or gravel one.

●Never operate an ATV without wearing an approved motorcycle helmet that fits properly. You should also wear eye protection (goggles or face shield), gloves, boots, a long-sleeved shirt or a jacket, and long pants.

●Never consume alcohol or drugs before or while operating this ATV.

●Never operate at speeds too fast for your skills or the riding conditions. Always go at a speed that is proper for the terrain, visibility, operating conditions, and your experience.

●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-

1ways follow the inspection and maintenance procedures and schedules described in this manual.

●Always keep both hands on the handlebars and both feet on the footboards of the ATV during operation.

●Always go slowly and be extra careful when operating on unfamiliar terrain. Always be alert to changing terrain conditions when operating the ATV.

●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.

●Always follow proper procedures for turning as described in this manual. Practice turning at low speeds before attempting to turn at faster speeds and never turn at excessive speeds.

●Never operate the ATV on hills too steep for the ATV or for your abilities. Practice on smaller hills before attempting larger hills.

●Always follow proper procedures for climbing hills as described in this manual. Check the terrain carefully before you start up any hill. Never climb hills with excessively slippery or loose surfaces. Shift your weight forward. Never open the throttle suddenly or make sudden gear changes. Never go over the top of a hill at high speed.

●Always follow proper procedures for going down hills and for braking on hills as described in this manual. Check the terrain carefully before you start down any hill. Shift your weight backward. Never go down a hill at high speed. Avoid going down a hill at an angle that would cause the vehicle to lean sharply to one side. Go straight down the hill where possible.

●Always follow proper procedures for crossing the side of a hill as described in this manual. Avoid hills with excessively slippery or loose surfaces. Shift your weight to the uphill side of the ATV. Never attempt to turn the ATV around on any hill until you have mastered the turning technique described in this manual on level ground. Avoid crossing the side of a steep hill if possible.

●Always use proper procedures if you stall or roll backwards when climbing a hill. To avoid stalling, use the proper gear and maintain a steady

1-2

speed when climbing a hill. If you stall or roll backwards, follow the special procedure for braking described in this manual. Dismount on the uphill side or to a side if pointed straight uphill. Turn the ATV around and remount, following the procedure described in this manual.

●Always check for obstacles before operating in a new area.

●Never attempt to operate over large obstacles, such as large rocks or fallen trees. Always follow proper procedures when operating over obstacles as described in this manual.

●Always be careful when skidding or sliding. Learn to safely control skidding or sliding by practicing at low speeds and on level, smooth terrain. On extremely slippery surfaces, such as ice, go slowly and be very cautious in order to reduce the chance of skidding or sliding out of control.

●Never operate an ATV in fast flowing water or in water deeper than that recommended in this manual. Remember that wet brakes may have reduced stopping ability. Test your brakes after leaving water. If necessary, apply them several times to let friction dry out the linings.

● Always be sure there are no obstacles or people
behind you when you operate in reverse. When	1
it is safe to proceed in reverse, go slowly.

●Always use the size and type of tires specified in this manual.

●Always maintain proper tire pressure as described in this manual.

●Never modify an ATV through improper installation or use of accessories.

●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 Consumer Products Safety Commission at 1-800-638-2772, or the ATV Distributor’s Safety Hotline at 1-800-852-5344.

1-3

EWB00021

WARNING

1POTENTIAL 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 exhaust pipe/muffler when refueling.

Never refuel while smoking, or in the vicinity of sparks, open flames, or other sources of ignition such as the pilot lights of water heaters and clothes dryers.

When transporting the ATV in another vehicle, be sure it is kept upright and that the fuel cock is in the “OFF” position. Otherwise, fuel may leak out of the carburetor or fuel tank.

WHAT CAN HAPPEN

Gasoline is poisonous and can cause injuries.

HOW TO AVOID THE HAZARD

If you should swallow some gasoline or inhale a lot of gasoline vapor, or get some gasoline in your eyes, seek medical help immediately. If gasoline spills on your skin, wash with soap and water. If gasoline spills on your clothing, change your clothes.

EWB00030

WARNING

POTENTIAL HAZARD

Starting or running the engine in a closed area.

1-4

WHAT CAN HAPPEN
Exhaust fumes are poisonous and may
cause loss of consciousness and death			1
within a short time.
HOW TO AVOID THE HAZARD
Always operate your ATV in an area with ad-
equate ventilation.

1-5

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LOCATION OF THE WARNING AND SPECIFICATION LABELS

2

2-1

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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- 2 ment label from your Yamaha dealer.

2-2

2

2-3

2

2-4

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	DESCRIPTION
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Left view	Right view

3

1.Front shock absorber assembly spring preload adjusting ring

2.Fuel cock

3.Recoil starter

4.Throttle stop screw

5.Fuses

6.Battery

7.Storage compartment and tool kit

8.Rear shock absorber assembly spring preload adjusting ring

9.Clutch adjusting screw

10.Shift pedal

1.Spark arrester

2.Air filter case

3.Engine oil filler cap

4.Spark plug

5.Oil filter element

6.Brake pedal

7.Rear brake light switch

3-1

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Controls and instruments

1.Rear brake lever

2.Parking brake lock plate

3.Starter (choke)

4.Speedometer

5.Reverse knob

6.Auxiliary DC jack

7.Front brake fluid reservoir

8.On-Command four-wheel-drive/differential gear lock switch

9.Front brake lever

10.Throttle lever 11.Fuel gauge 12.Main switch 13.Handlebar switches

NOTE:

The ATV you have purchased may differ slightly from the figures shown in this manual.

3

3-2

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INSTRUMENT AND CONTROL FUNCTIONS

EWB00010

WARNING

Indicates a potential hazard that could result in serious injury or death.

4 EBU17770

Main switch

The positions of the main switch are as follows:

ON

All electrical systems are supplied with power. The headlights, meter lighting and taillight come on when the light switch is on, and the engine can be started. The key cannot be removed.

OFF

All electrical systems are off. The key can be removed.

1. Main switch

4-1

EBU17813

Indicator lights and warning light

1.Reverse indicator light “REVERSE”

2.Neutral indicator light “NEUTRAL”

3.Oil temperature warning light “ ”

4.On-Command differential gear lock indicator light “ ”

5.On-Command four-wheel-drive indicator light “ ”

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Reverse indicator light “REVERSE”

This indicator light comes on when the transmission is in the reverse position.

Furthermore, this indicator light flashes:

●when the override switch is being pushed,

●when the engine is being raced for 10 seconds or more.

NOTE:
If the indicator light flashes under any other circum-
stances or the speedometer does not show the
speed while riding, have a Yamaha dealer check
the speed sensor circuit.
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Neutral indicator light “NEUTRAL”								4
This indicator light comes on when the transmis-
sion is in the neutral position.
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Oil temperature warning light “					”
This warning light comes on when the engine over-
heats. When this occurs, stop the engine as soon
as it is safe to do so, and allow it to cool.
The electrical circuit of the warning light can be
checked by turning the key to “ON”, with the engine
stop switch set to “ ”, and then pushing the start
switch.
If the warning light does not come on while the start
switch is being pushed, then go off after the start
switch is released, have a Yamaha dealer check
the electrical circuit.

4-2

If the warning light stays on, allow the engine to cool. If the warning light stays on when the engine is cool, have a Yamaha dealer check the electrical circuit.

ECB00010

CAUTION:

●The engine may overheat if the ATV is overloaded. In this case, reduce the load to spec-

4ification.

●Start the engine after making sure that the warning light is out. Continuous use while the warning light is on may cause damage to the engine.

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On-Command four-wheel-drive indicator light

“ ”

This indicator light comes on when the On-Com- mand four-wheel-drive switch is set to the “4WD” position.

NOTE:

Due to the synchronizing mechanism in the differential gear case, the light may not come on until the ATV starts moving.

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On-Command differential gear lock indicator light “ ”

This indicator light and the On-Command four- wheel-drive indicator light “ ” come on when the On-Command differential gear lock switch is set to the “LOCK” position.

EBU18020

Speedometer

The speedometer shows the riding speed. This speedometer is equipped with an odometer and a tripmeter. The tripmeter can be reset to “0” with the reset knob. Use the tripmeter to estimate how far you can ride on a tank of fuel before going to reserve. This information will enable you to plan fuel stops in the future.

4-3

1.Reset knob

2.Speedometer

3.Odometer

4.Tripmeter

EBU18050

Fuel gauge

The fuel gauge indicates the amount of fuel in the fuel tank. When the needle reaches the red line, refill the tank at the first opportunity.

4

1.Fuel gauge

2.Red line

NOTE:

If the ATV runs out of fuel, move the fuel cock lever to the “RES” position. Approximately 4.0 L (1.06 US gal) (0.88 Imp.gal) of fuel will be remaining in the tank.

4-4

EBU18061

Handlebar switches

4

1.Light switch “ / /OFF”

2.Start switch “ ”

3.	Engine stop switch “ /	”
4.	Override switch “OVERRIDE”
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Engine stop switch “		/ ”

Set this switch to “ ” before starting the engine. The engine stop switch controls the ignition and stops the engine when it is running. Use this switch to stop the engine in an emergency situation. The engine will not start or run when this switch is set to “ ”.

EBU18100

Start switch “ ”

Push this switch to crank the engine with the starter.

ECB00050

CAUTION:

See the starting instructions on page 6-1 prior to starting the engine.

EBU18160
Light switch “	/	/OFF”
Set this switch to “		” to turn on the low beams,

the taillight and the meter lighting. Set the switch to “ ” to turn on the high beams, the taillight and the meter lighting. Set the switch to “OFF” to turn off all the lights.

ECB00040

CAUTION:

Do not use the headlights with the engine turned off for an extended period of time, otherwise the battery may discharge to the point that the starter motor will not operate properly. If this should happen, remove the battery and recharge it.

4-5

EBU28350

Override switch “OVERRIDE”

1. Override switch “OVERRIDE”

Top speed is normally limited when operating in differential gear lock. If conditions require more engine power when riding forward, push and hold this switch to override the differential gear lock speed limiting function. (See page 4-8.) Releasing the switch restores the speed limiting function.

While the override switch is pushed, the reverse indicator light “REVERSE” will flash.

4-6

EWB00110

WARNING

POTENTIAL HAZARD

Riding too fast while the ATV is in four- wheel-drive differential gear lock.

WHAT CAN HAPPEN

All wheels turn at the same speed when the

differential is locked, so it takes more effort

4

to turn the ATV. The effort needed to turn increases with the riding speed. You may lose control and have an accident if you cannot make a sharp enough turn for the speed you are traveling.

HOW TO AVOID THE HAZARD

Always ride at a slow speed when the ATV is in four-wheel-drive differential gear lock, and allow extra time and distance for maneuvers.

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On-Command four-wheel-drive switch “2WD”/“4WD”

This ATV is equipped with a switch to change from two-wheel drive to four-wheel drive and vice-versa. Select the appropriate drive according to the terrain and the conditions.

●“2WD” (two-wheel drive): Power is supplied to the rear wheels.

			● “4WD” (four-wheel drive): Power is supplied to
			the rear and front wheels.
			To change from two-wheel drive to four-wheel
			drive, stop the ATV and push the switch in to the
			“4WD” position. The four-wheel-drive indicator
			light “ ” comes on.
			To change from four-wheel drive to two-wheel
			drive, stop the ATV and push the switch in to the
	4
			“2WD” position.

1. On-Command four-wheel-drive switch “2WD”/“4WD”

EWB00120

WARNING

POTENTIAL HAZARD

Changing from two-wheel drive to fourwheel drive or from four-wheel drive to twowheel drive while the ATV is moving.

WHAT CAN HAPPEN

The ATV handles differently in two-wheel drive than in four-wheel drive in some circumstances. Changing from two-wheel drive to four-wheel drive or from four-wheel drive to two-wheel drive while moving may cause the ATV to unexpectedly handle differently. This could distract the operator and increase the risk of losing control and of causing an accident.

HOW TO AVOID THE HAZARD

Always stop the ATV before changing from two-wheel drive to four-wheel drive or viceversa.

4-7

EBU28360

On-Command differential gear lock switch “4WD”/“LOCK”

This ATV is equipped with a switch allowing you to lock the differential gear when in four-wheel drive. Select the appropriate switch position according to the terrain and the conditions.

●“4WD” (four-wheel drive): Power is supplied to the rear and front wheels.

●“LOCK” (four-wheel drive with the differential gear locked): Power is supplied to the rear and front wheels and the differential gear is locked. Unlike in four-wheel drive, all wheels turn at the same speed.

To lock the differential gear in four-wheel drive, make sure the On-Command four-wheel-drive switch is pushed in to the “4WD” position.

4

1.Differential gear lock lever

2.On-Command four-wheel-drive switch “2WD”/“4WD”

Stop the ATV, move the differential gear lock lever to position (a), and then push the differential gear lock switch in to the “LOCK” position. When the differential gear is locked, the differential gear lock indicator light “ ” comes on.

1.On-Command four-wheel-drive switch “2WD”/“4WD”

2.On-Command differential gear lock switch “4WD”/“LOCK”

4-8

4

1. On-Command differential gear lock switch “4WD”/“LOCK”

To release the differential gear lock, stop the ATV and push the switch to the “4WD” position.

EWB00091

WARNING

POTENTIAL HAZARD

Changing from four-wheel drive to four- wheel-drive differential gear lock or vice-ver- sa while the ATV is moving.

WHAT CAN HAPPEN

The ATV handles differently in four-wheel drive than in differential gear lock in some circumstances. Changing from four-wheel drive to differential gear lock or vice-versa while moving may cause the ATV to handle differently unexpectedly. This could distract the operator and increase the risk of losing control and causing an accident.

HOW TO AVOID THE HAZARD

Always stop the ATV before changing from four-wheel drive to four-wheel-drive differential gear lock or vice-versa.

EWB00101

WARNING

POTENTIAL HAZARD

Riding too fast while the ATV is in four- wheel-drive differential gear lock.

WHAT CAN HAPPEN

All wheels turn at the same speed when the differential gear is locked, so it takes more effort to turn the ATV. The effort needed to turn increases with the riding speed. You may lose control and have an accident if you cannot make a sharp enough turn for the speed you are traveling.

4-9

HOW TO AVOID THE HAZARD

Always ride at a slow speed when the ATV is in differential gear lock, and allow extra time and distance for maneuvers.

NOTE:

●If the differential gear lock is not engaging properly, turn the handlebar back and forth to help it engage.

●Riding before the differential gear lock is properly engaged will cause the engine speed to be limited until engagement is complete.

●When the ATV is in four-wheel-drive differential gear lock, the maximum traveling speed is limited to 31 km/h (19 mi/h). However, if conditions require full engine power to be available, push and hold the override switch to disable the differential gear lock speed limiter. (See page 4-6 for a detailed explanation of this switch.)

EBU18270

Throttle lever

Once the engine is running, movement of the throttle lever will increase the engine speed.

Regulate the speed of the ATV by varying the throttle position. Because the throttle is springloaded, the ATV will decelerate, and the engine will return to an idle any time the hand is removed from the throttle lever.

4

1. Throttle lever

Before starting the engine, check the throttle to be sure it is operating smoothly. Make sure it returns to the idle position as soon as the lever is released.

4-10

EWB00200

WARNING

POTENTIAL HAZARD Malfunction of throttle. WHAT CAN HAPPEN

The throttle could be hard to operate, making it difficult to speed up or slow down

4

when you need to. This could cause an accident.

HOW TO AVOID THE HAZARD

Check the operation of the throttle lever before you start the engine. If it does not work smoothly, check for the cause. Correct the problem before riding the ATV. Consult a Yamaha dealer if you can’t find or solve the problem yourself.

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.

1.Loosen the locknut.

2.To increase the maximum engine power available and the maximum speed of the ATV, turn the adjusting screw in direction (a). To de-

crease the maximum engine power available and the maximum speed of the ATV, turn the adjusting screw in direction (b).

1.Locknut

2.Adjusting screw

3.No more than 12 mm (0.47 in)

3.Tighten the locknut.

EWB00190

WARNING

POTENTIAL HAZARD

Improper adjustment of the speed limiter and throttle.

4-11