tire type YAMAHA GRIZZLY 450 2012 Owners Manual

2-3
2steady speed when climbing a hill. If you stall or
roll backwards, follow the special procedure for
braking described in this manual. Dismount on
the uphill side or to a side if pointed straight up-
hill. Turn the ATV around and remount, following
the procedure described in this manual.

Always check for obstacles before operating in a
new area.
Never attempt to operate over large obstacles,
such as large rocks or fallen trees. Always follow
proper procedures when operating over obsta-
cles as described in this manual.
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 surfaces, such as
ice, go slowly and be very cautious in order to re-
duce the chance of skidding or sliding out of con-
trol.
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 necessary, 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 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 installa-
tion 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 in-
structions in this manual for carrying cargo or
pulling a trailer. Allow greater distance for brak-
ing.
WARNING
EWB00072Avoid Carbon Monoxide Poisoning
All engine exhaust contains carbon monoxide,
a deadly gas. Breathing carbon monoxide can
cause headaches, dizziness, drowsiness, nau-
sea, confusion, and eventually death.
Carbon Monoxide is a colorless, odorless,
tasteless gas which may be present even if you
do not see or smell any engine exhaust. Deadly
levels of carbon monoxide can collect rapidly
U1CT61E0.book Page 3 Wednesday, April 20, 2011 6:36 PM

5-6
5
Tire information
This ATV is equipped with tubeless tires with
valves.
WARNING
EWB02551Use of improper tires on this ATV may cause
loss of control, increasing your risk of an acci-
dent.After extensive tests, only the tires listed below
have been approved for this model by Yamaha
Motor Manufacturing Corporation of America. Aftermarket tires and rims
The tires and rims that came with your ATV were
designed to match the performance capabilities
and to provide the best combination of handling,
braking, and comfort. Other tires, rims, sizes, and
combinations may not be appropriate.1. Tire wear limit
Fro nt:
Manufacturer/model:YFM450FAPB CHENG SHIN/C-828
YFM45FGPB MAXXIS/MU13
YFM45FGPHB MAXXIS/MU13
Size: AT25 x 8-12
Type: Tu b e l e s s
Rear: Manufacturer/model:YFM450FAPB CHENG SHIN/C-828
YFM45FGPB MAXXIS/MU14
YFM45FGPHB MAXXIS/MU14
Size: AT25 x 10-12
Type: Tu b e l e s s
U1CT61E0.book Page 6 Wednesday, April 20, 2011 6:36 PM

10-3
10
Clutch:Clutch type:Wet, centrifugal automaticTransmission: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)
Low range: 45/16 (2.813)
High range: 38/23 (1.652)Chassis:Frame type:Steel tube frame
Caster angle: 2.5 °
Trail:
8.5 mm (0.33 in)Front tire:Type:Tubeless Size:
AT25 x 8-12
Manufacturer/model: YFM450FAPB CHENG SHIN/C-828
YFM45FGPB MAXXIS/MU13
YFM45FGPHB MAXXIS/MU13
Rear tire:Type:Tubeless
Size:
AT25 x 10-12
Manufacturer/model: YFM450FAPB CHENG SHIN/C-828
YFM45FGPB MAXXIS/MU14
YFM45FGPHB MAXXIS/MU14Loading:Maximum loading limit:210.0 kg (463 lb)
(Total weight of rider, cargo, accessories, and tongue)Tire air pressure (measured on cold tires):Recommended:Front: 25.0 kPa (0.250 kgf/cm ², 3.6 psi)
Rear: 25.0 kPa (0.250 kgf/cm ², 3.6 psi)
Minimum:
Front: 22.0 kPa (0.220 kgf/cm ², 3.2 psi)
Rear:
22.0 kPa (0.220 kgf/cm ², 3.2 psi)
U1CT61E0.book Page 3 Wednesday, April 20, 2011 6:36 PM