2001 YAMAHA YFM660R engine

Yuki_DATA2:HM00G210_YFM660R-60:YFM350TOC-E.frame
EL
EBU00015
CONTENTS
LOCATION OF THE WARNING AND
SPECIFICATION LABELS ....................... 1-1
SAFETY INFORMATION ........................ 2-1
DESCRIPTION AND MACHINE
IDENTIFICATION .................................... 3-1
Identification number records........... 3-3
Key identification number ................. 3-5
Vehicle identification number ........... 3-5
Model label ......................................... 3-7
CONTROL FUNCTIONS ......................... 4-1
Main switch ........................................ 4-1
Indicator and warning lights ............. 4-3
Handlebar switches.......................... 4-11
Throttle lever .................................... 4-15
Speed limiter .................................... 4-17
Clutch lever ....................................... 4-19
Front brake lever .............................. 4-19
Rear brake pedal .............................. 4-21
Parking brake .................................... 4-23
Shift pedal......................................... 4-27Reverse knob .....................................4-27
Fuel tank cap .....................................4-29
Fuel cock ............................................4-29
Starter (choke) ...................................4-31
Seat ....................................................4-33
Front shock absorber adjustment....4-35
Rear shock absorber adjustment .....4-37
PRE-OPERATION CHECKS .....................5-1
Front and rear brakes .........................5-5
Fuel.......................................................5-9
Engine oil ...........................................5-13
Coolant...............................................5-17
Chain ..................................................5-19
Throttle lever .....................................5-21
Fittings and Fasteners ......................5-21
Lights .................................................5-21
Switches ............................................5-21
Tires ...................................................5-23
How to measure tire pressure .........5-27
Tire wear limit ...................................5-291
2
3
4
5

ER
Yuki_DATA2:HM00G210_YFM660R-60:YFM350TOC-E.frame
OPERATION ........................................... 6-1
Starting a cold engine ....................... 6-3
Starting a warm engine ..................... 6-9
Warming up ........................................ 6-9
Reverse knob operation and
reverse driving ............................... 6-11
Shifting ............................................. 6-15
To start out and accelerate .............. 6-17
To decelerate .................................... 6-21
Engine break-in ................................ 6-23
Parking .............................................. 6-27
Parking on a slope ........................... 6-29
Accessories and loading ................. 6-31
Accessories....................................... 6-31
Loading ............................................. 6-33
RIDING YOUR ATV ................................ 7-1
Getting to know your ATV ................. 7-3
Ride with care and good judgement 7-5
Be careful where you ride ............... 7-27
Turning your ATV ............................ 7-39
Climbing uphill ................................. 7-45
Riding downhill ................................ 7-55
Crossing a slope ............................... 7-59
Crossing through shallow water .... 7-63
Riding over rough terrain ................ 7-67
Sliding and skidding ........................ 7-69What to do if... .................................. 7-73
What to do... ..................................... 7-73
PERIODIC MAINTENANCE AND
ADJUSTMENT ....................................... 8-1
Owner’s manual and tool kit ............. 8-3
Periodic maintenance/lubrication ..... 8-7
Panel removal and installation ....... 8-15
Engine oil and oil filter cartridge .... 8-17
Cooling system ................................ 8-31
Changing the coolant ...................... 8-33
Spark plug inspection ...................... 8-41
Air filter element cleaning ............... 8-45
Carburetor adjustment .................... 8-51
Idle speed adjustment ..................... 8-53
Valve clearance adjustment ............ 8-55
Reverse lock release cable
adjustment ..................................... 8-55
Throttle lever adjustment ................ 8-57
Front and rear brake pad
inspection ....................................... 8-59
Brake fluid level inspection ............. 8-61
Brake fluid replacement .................. 8-65
Front brake adjustment ................... 8-67
Rear brake adjustment .................... 8-69
Parking brake adjustment ............... 8-71
Clutch lever free play adjustment .... 8-756
7
8

2-1
Yuki_DATA2:HM00G210_YFM660R-60:YFM350-2.frameEL
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SAFETY INFORMATION
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 de-
scribed.


Never operate an ATV without proper in-
struction.


Always follow the age recommendation:
– A child under 16 years old should never
operate an ATV with engine size greater
than 90cc.

2-17
Yuki_DATA2:HM00G210_YFM660R-60:YFM350-2.frameEL
WARNING


Always turn off the engine when refuel-
ing.


Do not refuel right after the engine has
been running and is still very hot.


Do not spill gasoline on the engine or ex-
haust pipe/muffler when refueling. Never
refuel while smoking, or while in the vi-
cinity of sparks, open flames, or other
sources of ignition such as the pilot lights
of water heaters and clothes dryers. Gas-
oline can catch fire and you could be
burned.


When transporting the machine in anoth-
er vehicle, be sure it is kept upright and
that the fuel cock is in the “OFF” position.
Otherwise, fuel may leak out of the carbu-
retor or fuel tank.


Gasoline is poisonous. If you should swal-
low some gasoline or inhale a lot of gaso-
line vapor, or get some gasoline in your
eyes, see your doctor immediately. If gas-
oline spills on your skin, wash with soap
and water. If gasoline spills on your cloth-
ing, change your clothes.

2-19
Yuki_DATA2:HM00G210_YFM660R-60:YFM350-2.frameEL
WARNING
Always operate your machine in an area with
adequate ventilation. Never start or run the
engine in a closed area. Exhaust fumes are poi-
sonous and may cause loss of consciousness
and death within a short time.

3-1
Yuki_DATA2:HM00G210_YFM660R-60:YFM350-3.frameEL
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DESCRIPTION AND MACHINE
IDENTIFICATION
1. Seat
2. Fuel tank cap
3. Engine oil tank
4. Rear brake pedal
5. Headlight
6. Fuel cock
7. Throttle stop screw
8. Coolant reservoir
9. Tail/brake light10. Shift pedal
11. Clutch lever
12. Handlebar switches
13. Parking brake
14. Main switch
15. Reverse knob
16. Throttle lever
17. Front brake lever
NOTE:
The machine you have purchased may differ
slightly from those shown in the figures of this
manual.

4-1
Yuki_DATA2:HM00G210_YFM660R-60:YFM350-4.frameEL
EBU00040
CONTROL FUNCTIONS
EBU00041
Main switch
Functions of the respective switch positions
are as follows:
ON:
Engine can be started only at this position and
the headlight and taillight come on when the
light switch is on.
OFF:
All electrical circuits are switched off. The key
can be removed in this position.

4-5
Yuki_DATA2:HM00G210_YFM660R-60:YFM350-4.frameEL
EBU00713
Coolant temperature warning light “ ”
When the coolant temperature reaches a spec-
ified level, this light comes on to warn that the
coolant temperature is too hot. If the light
comes on during operation, stop the engine as
soon as it is safe to do so and allow the engine
to cool down for about 10 minutes.
The coolant temperature warning light circuit
can be checked according to the procedure on
page 4-7.
CAUTION:


The engine may overheat if the ATV is
overloaded. If this happens, reduce the
load to specification.


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