2011 YAMAHA YFZ450R wheel

9-2
9
EBU27261Storage Short-term
Always store your ATV in a cool, dry place and, if
necessary, protect it against dust with a porous
cover. NOTICE: Storing the ATV in a poorly ven-
tilated room or covering it with a tarp while it is
still wet, will allow water and humidity to seep
in and cause rust. To prevent corrosion, avoid
damp cellars, stables (because of the presence
of ammonia) and areas where strong chemi-
cals are stored.
[ECB00721]
Long-term
Before storing your ATV for several months:
1. Follow all the instructions in the “Cleaning”
section of this chapter.
2. Fill up the fuel tank and add fuel stabilizer (if
available) to prevent the fuel from deteriorat-
ing.3. Perform the following steps to protect the cyl-
inder, piston rings, etc. from corrosion.
a. Remove the spark plug cap and spark
plug.
b. Pour a teaspoonful of engine oil into the
spark plug bore.
c. Install the spark plug cap onto the spark
plug, and then place the spark plug on the
cylinder head so that the electrodes are
grounded. (This will limit sparking during
the next step.)
d. Turn the engine over several times with the
starter. (This will coat the cylinder wall with
oil.)
e. Remove the spark plug cap from the spark
plug, and then install the spark plug and
the spark plug cap.
4. Lubricate all control cables and the pivoting
points of all levers and pedals.
5. Check and, if necessary, correct the tire air
pressure, and then block up the ATV so that
all of its wheels are off the ground. Alternative-
ly, turn the wheels a little every month in order
to prevent the tires from becoming degraded
in one spot. Specified amount:
7.5 ml of stabilizer to each liter of fuel (or 1
oz of stabilizer to each gallon of fuel)U18P64E0.book Page 2 Thursday, May 13, 2010 6:00 PM

10-1
10
EBU25960
SPECIFICATIONS
Dimensions:Overall length:
1795 mm (70.7 in)
Overall width:
1240 mm (48.8 in)
Overall height:
1065 mm (41.9 in)
Seat height:
810 mm (31.9 in)
Wheelbase:
1270 mm (50.0 in)
Ground clearance:
235 mm (9.3 in)
Minimum turning radius:
3600 mm (142 in)Weight:With oil and fuel:
184.0 kg (406 lb)Noise and vibration level:Noise level (77/311/EEC):
84.5 dB(A) (EUR)(FRA)(GBR)
Vibration on seat (EN1032, ISO5008):
Will not exceed 0.5 m/s² (EUR)(FRA)(GBR)
Vibration on handlebar (EN1032, ISO5008):
Will not exceed 2.5 m/s² (EUR)(FRA)(GBR)Engine:Engine type:
Liquid cooled 4-stroke, DOHCCylinder arrangement:
Forward-inclined single cylinder
Displacement:
449 cm³
Bore × stroke:
95.0 × 63.4 mm (3.74 × 2.50 in)
Compression ratio:
11.40 :1
Starting system:
Electric starter
Lubrication system:
Dry sump
Engine oil:Recommended brand:
YAMALUBE
U18P64E0.book Page 1 Thursday, May 13, 2010 6:00 PM

10-3
10
Transmission type:
Constant mesh 5-speed
Operation:
Left foot operation
Gear ratio:
1st:
35/14 (2.500)
2nd:
30/15 (2.000)
3rd:
31/19 (1.632)
4th:
28/21 (1.333)
5th:
23/21 (1.095)Chassis:Frame type:
Aluminum die-cast and 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/KT351 RadialRear tire:Type:
TubelessSize:
AT20 x 10R9
Manufacturer/model:
DUNLOP/KT356 Radial
Loading: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 5.5ATRear wheel:Wheel type:
Panel wheel
Rim size:
9 x 8.0AT
U18P64E0.book Page 3 Thursday, May 13, 2010 6:00 PM

10-4
10
Front brake:Type:
Dual disc brake
Operation:
Right hand operation
Recommended fluid:
DOT 4Rear brake:Type:
Single disc brake
Operation:
Right foot operation
Recommended fluid:
DOT 4Front suspension:Type:
Double wishbone
Spring/shock absorber type:
Coil spring/gas-oil damper
Wheel travel:
250 mm (9.9 in)Rear suspension:Type:
Swingarm (link suspension)
Spring/shock absorber type:
Coil spring/gas-oil damper
Wheel travel:
280 mm (11.0 in)Electrical system:Ignition system:
TCICharging system:
AC magneto
Battery:Model:
YTZ7S
Voltage, capacity:
12 V, 6.0 AhHeadlight:Bulb type:
Krypton bulbBulb voltage, wattage × quantity:Headlight:
12 V, 30.0/30.0 W × 2
Tail/brake light:
LED
Neutral indicator light:
LED
Fuel level warning light:
LED
Coolant temperature warning light:
LED
Engine trouble warning light:
LEDFuse:Fuse:
20.0 A
U18P64E0.book Page 4 Thursday, May 13, 2010 6:00 PM

Maintenance and lubrication chart ................................. 8-5
Maintenance chart, emission control system ................. 8-3
Model label ................................................................... 11-2NNeutral indicator light ..................................................... 4-2OOwner’s manual and tool kit ........................................... 8-2PParking ........................................................................... 6-4
Parking brake free play, adjusting ................................ 8-31
Parking brake lever ........................................................ 4-7
Parking on a slope ......................................................... 6-5
Part locations ................................................................. 3-1RRiding your ATV ............................................................. 7-1SSafety information .......................................................... 2-1
Seat .............................................................................. 4-10
Shifting ........................................................................... 6-2
Shift pedal ...................................................................... 4-8
Shift pedal, checking .................................................... 8-38
Shock absorber assemblies, adjusting the front .......... 4-11
Shock absorber assembly, adjusting the rear .............. 4-16
Spark arrester, cleaning ............................................... 8-24
Spark plug, checking .................................................... 8-12
Specifications ............................................................... 10-1
Speed limiter .................................................................. 4-5
Start switch ..................................................................... 4-4
Steering shaft, lubricating ............................................. 8-41
Storage ........................................................................... 9-2
Suspension, lubricating the upper and lower arm
pivots .......................................................................... 8-40Swingarm pivots, lubricating ........................................ 8-39
TTail/brake light .............................................................. 8-47
Throttle lever ........................................................... 4-4, 5-5
Throttle lever free play, adjusting ................................. 8-26
Tires ............................................................................... 5-5
Troubleshooting ........................................................... 8-49
Troubleshooting charts ................................................. 8-50VValve clearance ............................................................ 8-27
Vehicle identification number ....................................... 11-1WWheel hub bearings, checking ..................................... 8-39
Wheel, installing ........................................................... 8-48
Wheel, removing .......................................................... 8-47
U18P64E0.book Page 2 Thursday, May 13, 2010 6:00 PM