Page 50 of 446
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 of 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.
U5ND61.book Page 13 Thursday, June 5, 2003 7:02 PM
Page 156 of 446
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)2. The tires should be set to the recommend-
ed pressure:
Manufacturer Size Type
Front MAXXIS AT25
× 8 - 12 M911Y
Rear MAXXIS AT25
× 10 - 12 M912Y
Manufacturer Size Type
Front CHENG-SHIN AT25
× 8 - 12 C828
Rear CHENG-SHIN AT25
× 10 - 12 C828
U5ND61.book Page 25 Thursday, June 5, 2003 7:02 PM
Page 210 of 446
7-15
WARNING
_ Always use the size and type tires specified in
the Owner’s Manual for this vehicle on page
5-25. Always maintain proper tire pressure 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 uneven tire pres-
sure, 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. _
U5ND61.book Page 15 Thursday, June 5, 2003 7:02 PM
Page 427 of 446
10-4
Spark plug:
Type/manufacturer DR8EA / NGK
Spark plug gap 0.6–0.7 mm
Clutch type: Wet, centrifugal automatic
Transmission:
Primary reduction system V-belt
Secondary reduction system Shaft drive
Secondary reduction ratio 39/24
× 24/18
× 33/9 (7.944)
Transmission type V-belt automatic
Operation Left hand operation
Reverse gear 29/17 (1.706)
Sub transmission ratio low 45/16 (2.813)
high 38/23 (1.652)
Chassis:
Frame type Steel tube frame
Caster angle 4°
Trail 21 mm
Tire:
Ty p e T u b e l e s s
Size front AT25
×8 - 12
rear AT25
× 10 - 12 ModelYFM450FA
U5ND61.book Page 4 Thursday, June 5, 2003 7:02 PM
