wheel YAMAHA YFZ450 2012 Owner's Manual

8-54
82. Remove the burnt-out bulb by pushing it in
and turning it counterclockwise. 3. Insert a new bulb into the bulb holder, push it
in, and then turn it clockwise until it stops.
4. Install the bulb holder (together with the bulb) by turning it clockwise.
EBU25651Removing a wheel 1. Place the ATV on a level surface.
2. Loosen the wheel nuts.
1. Tail/brake light bulb holder
1
1. Tail/brake light bulb holder
2. Tail/brake light bulb
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8-55
8
Front
Rear
3. Elevate the ATV and place a suitable stand
under the frame.
4. Remove the nuts from the wheel.
5. Remove the wheel.
EBU25661Installing a wheel 1. Place the ATV on a level surface.
2. Install the wheel and the nuts.
3. Lower the ATV to the ground.
4. Tighten the wheel nuts to the specified torques.EBU25740Troubleshooting Although Yamaha ATVs receive a thorough in-
spection before shipment from the factory, trouble
may occur during operation. Any problem in the fu-
el, compression, or ignition systems, for example,
can cause poor starting and loss of power.
1. Nut
1. Nut
Tightening torques:Front wheel nut:45 Nm (4.5 m ·kgf, 33 ft ·lbf)
Rear wheel nut: 45 Nm (4.5 m ·kgf, 33 ft ·lbf)
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9-1
9
EBU25860
CLEANING AND STORAGE
EBU25902Cleaning Frequent, thorough cleaning of your ATV will not
only enhance its appearance but will improve its
general performance and extend the useful life of
many components.1. Before cleaning the ATV: a. Block off the end of the exhaust pipe toprevent water entry. A plastic bag and
strong rubber band may be used.
b. Make sure the spark plug and all filler caps are properly installed.
2. If the engine case is excessively greasy, apply degreaser with a paint brush. Do not apply de-
greaser to the chain, sprockets or wheel ax-
les.
3. Rinse the dirt and degreaser off with a garden hose. Use only enough pressure to do the job.
WARNING! Wet brakes may have reduced stopping ability, increasing the chance of
an accident. Test the brakes after washing.
Apply the brakes several times at slow
speeds to let friction dry out the linings.
[EWB02311]
NOTICE: Excessive water pressure may cause water seepage and deteriora-
tion of wheel bearings, brakes, transmis-
sion seals and electrical devices. Many
expensive repair bills have resulted from
improper high-pressure detergent applica-
tions such as those available in coin-oper-
ated car washers.
[ECB00711]
4. Once most of the dirt has been hosed off,
wash all surfaces with warm water and mild,
detergent-type soap. An old toothbrush or bot-
tle brush is handy for hard-to-reach places.
5. Rinse the ATV off immediately with clean wa- ter and dry all surfaces with a chamois, clean
towel or soft absorbing cloth.
6. Dry the chain and lubricate it to prevent it from rusting.
7. Clean the seat with a vinyl upholstery cleaner to keep the cover pliable and glossy.
8. Automotive type wax may be applied to all painted and chrome plated surfaces. Avoid
combination cleaner-waxes. Many contain
abrasives which may mar the paint or protec-
tive finish. When finished cleaning, start the
engine and let it idle for several minutes.
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9-2
9
EBU25933Storage 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. Turn the fuel cock lever to “OFF ”.
3. Drain the carburetor float chamber by loosen- ing the drain bolt; this will prevent fuel deposits
from building up. Pour the drained fuel into the
fuel tank.
4. Fill up the fuel tank and add fuel stabilizer (if available) to prevent the fuel from deteriorat-
ing. 5. 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.
6. Lubricate all control cables and the pivoting points of all levers and pedals.
7. 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-
Specified amount:
7.5 ml of stabilizer to each liter of fuel (or 1
oz of stabilizer to each gallon of fuel)U1PD60E0.book Page 2 Monday, June 13, 2011 2:57 PM

9-3
9
ly, turn the wheels a little every month in order
to prevent the tires from becoming degraded
in one spot.
8. Cover the muffler outlet with a plastic bag to prevent moisture from entering it.
9. Remove the battery and fully charge it. Store it in a cool, dry place and charge it once a
month. Do not store the battery in an exces-
sively cold or warm place [less than 0 ° C (30
° F) or more than 30 ° C (90 °F)]. For more in-
formation on storing the battery, see page
8-48.
TIPMake any necessary repairs before storing the
ATV.U1PD60E0.book Page 3 Monday, June 13, 2011 2:57 PM

10-1
10
EBU25961
SPECIFICATIONS
Dimensions:Overall length:1840 mm (72.4 in)
Overall width: 1170 mm (46.1 in)
Overall height:
1090 mm (42.9 in)
Seat height: 810 mm (31.9 in)
Wheelbase: 1280 mm (50.4 in)
Ground clearance:
255 mm (10.0 in)
Minimum turning radius: 3500 mm (138 in)Weight:With oil and fuel:
169.0 kg (373 lb)Noise and vibration level:Noise level (77/311/EEC):82.0 dB(A)@3750 r/min (EUR)(FRA)(GBR)
A-weighted sound power level:
98.0 dB(A)@3750 r/min (EUR)(FRA)(GBR)
Vibration on seat (EN1032, ISO5008): Will not exceed 0.5 m/s ² (EUR)(FRA)(GBR)
Vibration on handlebar (EN1032, ISO5008): Will not exceed 2.5 m/s ² (EUR)(FRA)(GBR)
Engine:Engine type:
Liquid cooled 4-stroke, DOHC
Cylinder arrangement: Forward-inclined single cylinder
Displacement:
449 cm ³
Bore × stroke:
95.0 × 63.4 mm (3.74 × 2.50 in)
Compression ratio: 11.40 : 1
Starting system:
Electric starter
Lubrication system: Dry sumpEngine oil:Recommended brand:
YAMALUBE
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10-3
10
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 7-10
Manufacturer/model: DUNLOP/KT851B Bias
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:
25.0 kPa (0.250 kgf/cm ², 3.6 psi)
Rear: 30.0 kPa (0.300 kgf/cm ², 4.4 psi)
Minimum: Front: 22.0 kPa (0.220 kgf/cm ², 3.2 psi)
Rear: 27.0 kPa (0.270 kgf/cm ², 4.0 psi)Front wheel:Wheel type:
Panel wheel
Rim size: 10 x 5.5ATRear wheel:Wheel type:Panel wheel
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10-4
10
Rim size:9 x 8.0ATFront brake:Type:
Disc brake
Operation: Right hand operation
Specified brake fluid: DOT 4Rear brake:Type:Disc brake
Operation: Right foot operation
Specified brake fluid:
DOT 4Front suspension:Type:Double wishbone
Spring/shock absorber type:
Coil spring/oil damper
Wheel travel: 230 mm (9.1 in)Rear suspension:Type:
Swingarm (link suspension)
Spring/shock absorber type: Coil spring/gas-oil damper
Wheel travel: 270 mm (10.6 in)
Electrical system:Ignition system:DC CDI
Charging system:
AC magnetoBattery:Model:GT7B-4
Voltage, capacity:
12 V, 6.5 AhHeadlight:Bulb type:Krypton bulbBulb voltage, wattage × quantity:Headlight:
12 V, 30.0/30.0 W × 2
Tail/brake light: 12 V, 5.0/21.0 W × 1
Neutral indicator light:
12 V, 1.7 W × 1
Coolant temperature warning light: 12 V, 1.7 W × 1Fuses:Main fuse:
15.0 A
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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 ........................................... 8-2PPanel, removing and installing ....................................... 8-9
Parking ........................................................................... 6-5
Parking brake free play, adjusting ................................ 8-37
Parking brake lever ........................................................ 4-6
Parking on a slope ......................................................... 6-6
Part locations ................................................................. 3-1RRiding your ATV ............................................................. 7-1SSafety information .......................................................... 2-1
Seat .............................................................................. 4-12
Shifting ........................................................................... 6-3
Shift pedal ...................................................................... 4-7
Shift pedal, checking .................................................... 8-45
Shock absorber assemblies, adjusting the front .......... 4-13
Shock absorber assembly, adjusting the rear .............. 4-14
Spark arrester, cleaning ............................................... 8-28
Spark plug, checking .................................................... 8-10
Specifications ............................................................... 10-1
Speed limiter .................................................................. 4-4
Starter (choke) ............................................................. 4-11
Start switch ..................................................................... 4-3
Steering shaft, lubricating ............................................. 8-47
Storage ........................................................................... 9-2 Suspension, lubricating the upper and lower arm
pivots ......................................................................... 8-46
Swingarm pivots, lubricating ........................................ 8-46
TTail/brake light bulb, replacing ..................................... 8-53
Throttle lever ........................................................... 4-3, 5-5
Throttle lever free play, adjusting ................................. 8-31
Tires ............................................................................... 5-5
Troubleshooting ........................................................... 8-55
Troubleshooting charts ................................................. 8-57VValve clearance ............................................................ 8-31
Vehicle identification number ....................................... 11-1WWheel hub bearings, checking ..................................... 8-45
Wheel, installing ........................................................... 8-55
Wheel, removing .......................................................... 8-54
U1PD60E0.book Page 2 Monday, June 13, 2011 2:57 PM