2021 YAMAHA KODIAK 450 tire size

3-3
3
technique described in this manual on level
ground. Avoid crossing the side of a steep hill if
possible.
 Always use proper procedures if you stall or roll
backwards when climbing a hill. To avoid stall-
ing, use the proper gear range 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
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 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 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.
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6-6
6
Tire inspection
When the tire tread depth has worn to 3 mm (0.12
in) replace the tire. If the tire has a nail or glass
fragments in it, or if the sidewall is cracked, re-
place the tire.
Tire information
This ATV is equipped with tubeless tires and tire
air valves. After extensive tests, only the tires list-
ed below are approved for this model by Yamaha.
WARNING
EWB02552Use of improper tires on this ATV may cause
loss of control, increasing your risk of an acci-
dent.
1. Tire tread depth
Front:
Manufacturer/model:CHENG SHIN/CU905
Size: AT 2 5 x 8 - 1 2
Rear: Manufacturer/model:CHENG SHIN/CU906
Size: AT25x10-12
Maximum tire seating pressure: Front250 kPa (2.5 kgf/cm², 36 psi)
Rear 250 kPa (2.5 kgf/cm², 36 psi)
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6-7
6Aftermarket 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.
EBU19841Chassis fastenersMake sure that all nuts, bolts and screws are
properly tightened.EBU19851Instruments, lights and switchesCheck that all instruments, lights and switches are
working properly. Correct if necessary.UBEY60E0.book Page 7 Monday, July 27, 2020 10:46 AM

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Quantity:0.23 L (0.24 US qt, 0.20 Imp.qt) (YFM450FWBD)
0.35 L (0.37 US qt, 0.31 Imp.qt) (YFM450FWB)Coolant quantity:Radiator (including all routes):1.32 L (1.40 US qt, 1.16 Imp.qt)
Coolant reservoir (up to the maximum level mark):
0.25 L (0.26 US qt, 0.22 Imp.qt)Air filter:Air filter element:Wet element
Air filter oil grade:
Foam air-filter oilFuel:Recommended fuel:Regular unleaded gasoline (Gasohol [E10] acceptable)
Minimum research octane:
91
Fuel tank capacity: 14 L (3.7 US gal, 3.1 Imp.gal)
Fuel reserve amount: 4.0 L (1.06 US gal, 0.88 Imp.gal)Throttle body:ID mark:BB51Spark plug (s):Manufacturer/model:
NGK/DR7EA
Spark plug gap: 0.6–0.7 mm (0.024–0.028 in)
Drivetrain:Primary reduction ratio:1.000
Secondary reduction ratio:
7.944 (39/24 x 24/18 x 33/9)
Final drive: Shaft
Clutch type: Wet, centrifugal, shoe
Transmission type:
CVT automatic with reverse
Gear ratio: Transmission ratio:
2.550–0.750 : 1
Reverse gear: 1.706 (29/17)
Low range: 2.813 (45/16)
High range:
1.652 (38/23)Front tire:Size:AT25x8-12
Manufacturer/model:
CHENG SHIN/CU905Rear tire:Size:AT25x10-12
Manufacturer/model:
CHENG SHIN/CU906
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Tire air pressure (measured on cold tires):No cargo or trailer:
Recommended:Front:
35.0 kPa (0.350 kgf/cm², 5.0 psi)
Rear: 30.0 kPa (0.300 kgf/cm², 4.4 psi)
Minimum: Front:32.0 kPa (0.320 kgf/cm², 4.6 psi)
Rear: 27.0 kPa (0.270 kgf/cm², 4.0 psi)
With cargo or trailer:
Recommended: Front:50.0 kPa (0.500 kgf/cm², 7.3 psi)
Rear: 50.0 kPa (0.500 kgf/cm², 7.3 psi)
Minimum:
Front:45.0 kPa (0.450 kgf/cm², 6.5 psi)
Rear:
45.0 kPa (0.450 kgf/cm², 6.5 psi) Front wheel:Rim size:12 x 6.0ATRear wheel:Rim size:12 x 7.5AT
Front brake:Type:Hydraulic disc brakeRear brake:Type:Mechanical wet multiple disc brakeBrake fluid:Specified brake fluid:
DOT 4Front suspension:Type:Double wishbone
Spring:
Coil spring
Shock absorber: Gas-hydraulic damper
Wheel travel: 171 mm (6.8 in)Rear suspension:Type:Double wishbone
Spring: Coil spring
Shock absorber:
Gas-hydraulic damper
Wheel travel: 189 mm (7.4 in)Electrical system:System voltage:
12 V
UBEY60E0.book Page 4 Monday, July 27, 2020 10:46 AM