2001 YAMAHA YFM660R tire size

2-13
Yuki_DATA2:HM00G210_YFM660R-60:YFM350-2.frameEL


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.

5-23
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EBU00158
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

7-15
Yuki_DATA2:HM00G210_YFM660R-60:YFM350-7.frameEL
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.

Yuki_DATA2:HM00G210_YFM660R-60:YFM350-SPEC-E.frameER
10-4
Gear ratio:
1st
2nd
3rd
4th
5th
Reverse34/14 (2.428)
29/19 (1.526)
26/21 (1.238)
22/21 (1.047)
19/21 (0.904)
28/23× 23/16 (1.750)
Chassis:
Frame type
Caster angle
TrailSteel tube
8

°
47 mm
Tire:
Type
Size: Front
Size: RearTubeless
AT21
× 7 - 10
AT20
× 10 - 9
Brake:
Front brake type
Operation
Rear brake type
OperationDual disc brake
Right hand operation
Single disc brake
Right foot operation
Suspension:
Front
RearDouble wishbone
Swingarm (link suspension)
Shock absorber:
Front
RearCoil spring/oil damper
Coil spring/gas-oil damper MODEL YFM660R