2006 YAMAHA GRIZZLY 660 tire size

2-13

Always be sure there are no obstacles or peo-
ple behind you when you operate in reverse.
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.


Never modify an ATV through improper instal-
lation 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 brak-
ing.
U2C660.book Page 13 Monday, April 11, 2005 10:29 AM

5-25
EBU00158
Tires
Always use the recommended tires.
WARNING
Use of improper tires on this ATV, or operation
of this ATV with improper or uneven tire pres-
sure, may cause loss of control, increasing
your risk of accident.
Pay attention to the following.
1. The tires listed below have been approved
by Yamaha Motor Co., Ltd. for this model.
Other tire combinations are not recom-
mended.(For Europe)
(For Oceania)
Manufacturer Size Type
Front DUNLOP AT25
× 8 - 12 KT131
Rear DUNLOP AT25
× 10 - 12 KT135
Manufacturer Size Type
Front CHENG-SHIN AT25
× 8 - 12 C828-4P
Rear CHENG-SHIN AT25
× 10 - 12 C828-4P
U2C660.book Page 25 Monday, April 11, 2005 10:29 AM

7-15
WARNING
_ Always use the size and type tires specified in
the Owner’s Manual for this vehicle on
pages 5-25–5-27. Always maintain proper tire
pressure as described in the Owner’s Manual
on page 5-29. Use of improper tires on this
ATV, or operation of this ATV with improper or
uneven tire pressure, may cause loss of con-
trol, 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. _
U2C660.book Page 15 Monday, April 11, 2005 10:29 AM

10-4
Spark plug:
Type/manufacturer DPR8EA-9 / NGK
Spark plug gap 0.8–0.9 mm
Clutch type: Wet, centrifugal automatic
Transmission:
Primary reduction system V-belt
Secondary reduction system Shaft drive
Secondary reduction ratio 41/21
× 24/18
× 33/9 (9.544)
Transmission type V-belt automatic
Operation Left hand operation
Reverse gear 25/17 (1.471)
Sub transmission ratio low 35/17 (2.058)
high 26/21 (1.238)
Chassis:
Frame type Steel tube frame
Caster angle 5°
Trail 26 mm
Tire:
Ty p e Tu b e l e s s
Size (front) AT25
× 8-12
(rear) AT25 ×10 - 12 Model YFM66FA
U2C660.book Page 4 Monday, April 11, 2005 10:29 AM