tires YAMAHA YFM660R 2001 Owners Manual

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

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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 sur-
faces, 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 neces-
sary, 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 re-
verse. When it is safe to proceed in reverse,
go slowly.


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


Always maintain proper tire pressure as de-
scribed in this manual.

5-1
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PRE-OPERATION CHECKS
Before using this machine, check the following points:
ITEM ROUTINE PAGE
Brakes• Check operation, free play, fluid level and fluid leakage.
• Fill with DOT 4 brake fluid if necessary.5-5 ~ 5-7,
8-59 ~ 8-69
Clutch• Check operation, condition and lever free play. 8-75
Parking brake• Check operation, condition and cable slack. 8-71 ~ 8-73
Fuel• Check fuel level.
• Fill with fuel if necessary.5-9 ~ 5-11
Engine oil• Check oil level.
• Fill with oil if necessary.5-13 ~ 5-15,
8-17 ~ 8-29
Coolant reservoir• Check coolant level.
• Fill with coolant if necessary.5-17, 8-31
Drive chain• Check chain slack and condition.
• Adjust if necessary.5-19, 8-77 ~ 8-83
Throttle• Check for proper throttle cable operation. 5-21, 8-57
Wheels and tires• Check tire pressure, wear and damage.5-23 ~ 5-29,
8-93 ~ 8-95
Fittings and Fasteners• Check all fittings and fasteners. 5-21
Lights• Check for proper operation. 5-21, 8-105 ~ 8-115

5-23
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Tires
Always use the recommended tires.
WARNING
Use of improper tires on this ATV, or opera-
tion of this ATV with improper or uneven tire
pressure, may cause loss of control, increasing
your risk of accident.
Pay attention to the following.
1. The tires listed below have been ap-
proved by Yamaha Motor Co., Ltd. for this
model. Other tire combinations are not
recommended.
Manufacturer Size Type
Front DUNLOP AT21 × 7-10 KT331
Rear DUNLOP AT20 × 10-9 KT335

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2. The tires should be set to the recom-
mended pressure:
Recommended tire pressure
Front 27.5 kPa (0.275 kg/cm2, 0.275 bar)
Rear 27.5 kPa (0.275 kg/cm2, 0.275 bar)
Check and adjust tire pressures when the
tires are cold.
Tire pressures must be equal on both sides.
3. Tire pressure below the minimum speci-
fied could cause the tire to dislodge from
the rim under severe riding conditions.
The following are minimums:
Front 24.5 kPa (0.245 kg/cm
2, 0.245 bar)
Rear 24.5 kPa (0.245 kg/cm
2, 0.245 bar)
4. Use no more than the following pressures
when seating the tire beads.
Front 250 kPa (2.5 kg/cm
2, 2.5 bar)
Rear 250 kPa (2.5 kg/cm
2, 2.5 bar)
Higher pressures may cause the tire to
burst. Inflate the tires very slowly and
carefully. Fast inflation could cause the
tire to burst.

5-27
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1. Low-pressure tire gauge
1. Manomètre basse pression pour pneus
1. Manómetro de baja presión
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How to measure tire pressure
Use the low-pressure tire gauge.
NOTE:
The low-pressure tire gauge is included as
standard equipment. Make two measurements
of the tire pressure and use the second read-
ing. Dust or dirt in the gauge could cause the
first reading to be incorrect.
Set pressure with tires cold.
Set tire pressures to the following specifica-
tions:
Recommended
pressureMinimum Maximum
Front27.5 kPa
(0.275 kg/cm
2,
0.275 bar)24.5 kPa
(0.245 kg/cm2,
0.245 bar)30.5 kPa
(0.305 kg/cm2,
0.305 bar)
Rear27.5 kPa
(0.275 kg/cm
2,
0.275 bar)24.5 kPa
(0.245 kg/cm2,
0.245 bar)30.5 kPa
(0.305 kg/cm2,
0.305 bar)

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To decelerate:
When slowing down or stopping, release the
throttle and apply the brakes smoothly and
evenly. As you slow down, shift to a lower
gear. Be sure that the engine has sufficiently
slowed before engaging a lower gear. Improp-
er use of the brakes or shifting can cause the
tires to lose traction, reducing control and in-
creasing the possibility of an accident.
WARNING
Make sure the engine has sufficiently slowed
before shifting to a lower gear. Engaging a
lower gear when the engine speed is too high
could make the wheels stop rotating. This
could cause loss of control, an accident and in-
jury. It could also cause engine or drive train
damage.

7-15
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WARNING
Always use the size and type tires specified in
the Owner's Manual for this vehicle on pages
5-23 ~ 5-25. Always maintain proper tire pres-
sure as described in the Owner's Manual on
page 5-27. Use of improper tires on this ATV,
or operation of this ATV with improper or un-
even tire pressure, may cause loss of control,
increasing your risk of an accident.
Do not operate at speeds too fast for your
skills or the conditions.
WARNING
Always go at a speed that is proper for the ter-
rain, visibility and operating conditions, and
your experience. Operating this ATV at speeds
too fast for your skills or the conditions in-
creases your chances of losing control of the
ATV, which can result in an accident.

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CAUTION:
Do not shift gears without releasing the throt-
tle. Damage to the engine or drive train may
occur.
When slowing down or stopping, release the
throttle and apply the brakes smoothly and
evenly. As you slow down, shift to a lower
gear. Be sure that the engine has sufficiently
slowed before engaging a lower gear. Improp-
er use of the brakes or shifting can cause the
tires to lose traction, reducing control and in-
creasing the possibility of an accident.
WARNING
Make sure the engine has sufficiently slowed
before shifting to a lower gear. Engaging a
lower gear when the engine speed is too high
could cause the wheels to stop rotating.

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CROSSING THROUGH SHALLOW WATER
The ATV can be used to cross slow moving,
shallow water of up to a maximum of 35 cm 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. Drive
slowly and carefully.
WARNING
Never operate this ATV in fast flowing water
or in water deeper than that specified in your
Owner’s 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. If the ATV is operated through deep or
fast flowing water, the tires may float, causing
loss of traction and loss of control, which
could lead to an accident.