tire size YAMAHA YFZ450 2013 Owners Manual

2-3
2
●Always use proper procedures if you stall or roll
backwards when climbing a hill. To avoid stall-
ing, use the proper gear and maintain a steady
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 havereduced stopping ability. Test your brakes after
leaving water. If necessary, apply them several
times to let friction dry out the linings.
●Always use the size and type of tires specified in
this manual.●Always maintain proper tire pressure as de-
scribed in this manual.●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.●Do not operate your ATV during darkness un-
less it is equipped with a properly functioning
headlight. Off-road riding is inherently danger-
ous and additionally, off-road trails do not have
streetlights to guide you.●Never maintain an ATV without proper knowl-
edge. Contact an authorized ATV dealer to in-
form you on basic ATV maintenance. Certain
maintenance can only be carried out by certified
staff.
U1PD61E0.book Page 3 Tuesday, February 14, 2012 10:06 AM

5-7
5
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.
EBU19840Chassis fasteners Make sure that all nuts, bolts and screws are prop-
erly tightened.
EBU19850Instruments, lights and switches Check that all instruments, lights and switches are
working properly. Correct if necessary.
Fro nt:
Manufacturer/model:DUNLOP/KT341 Radial
Size: AT21 x 7R10
Ty p e : Tu b e l e s s
Rear: Manufacturer/model:DUNLOP/KT355A Radial
Size: AT20 x 10R9
Ty p e : Tu b e l e s s
U1PD61E0.book Page 7 Tuesday, February 14, 2012 10:06 AM

10-3
10
Primary reduction ratio:62/22 (2.818)
Secondary reduction system: Chain drive
Secondary reduction ratio:
38/14 (2.714)
Transmission type: Constant mesh 5-speed
Operation: Left foot operation
1st:
29/12 (2.416)
2nd: 27/14 (1.928)
3rd: 25/16 (1.562)
4th:
23/18 (1.277)
5th: 21/20 (1.050)Chassis:Frame type:
Steel tube frame
Caster angle: 5.0 °
Trail: 21.0 mm (0.83 in)Front tire:Type:Tubeless
Size: AT21 x 7R10 Manufacturer/model:
DUNLOP/KT341 Radial
Rear tire:Type:
Tubeless
Size: AT20 x 10R9
Manufacturer/model: DUNLOP/KT355A RadialLoading:Maximum loading limit:100.0 kg (220 lb)
(Total weight of rider, cargo, accessories, and tongue)Tire air pressure (measured on cold tires):Recommended:Front: 27.5 kPa (0.275 kgf/cm², 4.0 psi)
Rear: 30.0 kPa (0.300 kgf/cm², 4.4 psi)
Minimum:
Front: 24.5 kPa (0.245 kgf/cm², 3.6 psi)
Rear:
27.0 kPa (0.270 kgf/cm², 4.0 psi)Front wheel:Wheel type:Panel wheel
Rim size:
10 x 5.5AT
U1PD61E0.book Page 3 Tuesday, February 14, 2012 10:06 AM