wheel YAMAHA YFM90R 2009 Owner's Manual

9-3
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-
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 infor-
mation on storing the battery, see page 8-26.
TIPMake any necessary repairs before storing theATV.
9

10-1
10
SPECIFICATIONS
Engine:Engine type: Forced air cooled 4-stroke
Cylinder arrangement: Single cylinder
Displacement: 88 cm (5.37 cu.in)
3
Bore × stroke: 47.0 × 51.0 mm (1.85 x 2.0 in) Compression ratio:
Starting system: Electric starter & kickstarter
Lubrication system: Wet sump 10.2 : 1
Engine oil:Type:SAE10W-40 or SAE20W-50
Recommended engine oil grade: API service SG type or higher, JASO standard MA0 10 30
507090
110130 F
SAE 10W-40
SAE 5W-30
-20
-10 0 102030 40 50 C
SAE 20W-50
Dimensions:Overall length:
1490 mm (58.7 in)
Overall width: 885 mm (34.8 in)
Overall height: 910 mm (35.8 in)
Seat height: 654 mm (25.7 in)
Wheelbase: 1010 mm (39.8 in)
Ground clearance: 100 mm (3.9 in)
Minimum turning radius: 2900 mm (114 in)Weight:With oil and fuel: 120.0 kg (264 lb)

10-3
10
Rear tire:Type:Tubeless
Size: AT18 x 9-8
Manufacturer/model: MAXXIS/M940Loading:Maximum loading limit: 70.0 kg (154 lb)
(Total weight of rider, cargo, accessories, and tongue)Tire air pressure (measured on cold tires):Recommended:Front:25 kPa (3.6 psi) (0.25 kgf/cm
2)
Rear: 25 kPa (3.6 psi) (0.25 kgf/cm2)
Minimum: Front:22 kPa (3.2 psi) (0.22 kgf/cm2)
Rear: 22 kPa (3.2 psi) (0.22 kgf/cm2)
Front wheel:
Wheel type: Panel wheel
Rim size: 8 x 5.5AT
Rear wheel:Wheel type: Panel wheel
Rim size: 8 x 7ATFront brake:Type:Drum brake
Operation: Right hand operationRear brake:Type:Single disc brake
Operation: Left hand operation
Recommended fluid: DOT4Front suspension:Type:Double wishbone
Spring/shock absorber type: Coil spring/oil damper
Wheel travel:
111 mm (4.4 in)

10-4
10
Electrical system:Ignition system: CDI
Charging system: AC magnetoBattery:Model:
GTX5L-BS
Voltage, capacity: 12 V,4 .0 Ah Fuses:Main fuse: 10 A Noise and vibration level:Noise level (77/311/EEC):
77.4 dB(A) (EUR)
Vibration on seat (EN1032, ISO5008): Will not exceed 0.5 m/s
2 (EUR)
Vibration on handlebar (EN1032, ISO5008): Will not exceed 2.5 m/s2 (EUR)
Rear suspension:Type:Swingarm
Spring/shock absorber type: Coil spring/oil damper
Wheel travel: 83 mm (3.3 in)

OOwner’s manual and tool kit ........................................... 8-1PParking ........................................................................\
... 6-4
Parking brake ................................................................. 4-7
Parking on a slope ......................................................... 6-5
Part locations ................................................................. 3-1
Pre-operation check list.................................................. 5-1RRiding your ATV ............................................................. 7-1SSafety information .......................................................... 1-1
Spark arrester, cleaning ............................................... 8-19
Spark plug, checking ...................................................... 8-9
Specifications .................................................................. 10-1
Start switch..................................................................... 4-2
Storage........................................................................\
... 9-2TThrottle cable free play, checking................................8-21
Throttle lever..........................................................4-3, 5-4
Timing chain.................................................................8-22
Tire pressure, measuring ............................................... 5-5
Tires ........................................................................\
....... 5-4
Tire wear limit ................................................................. 5-6
Troubleshooting...........................................................8-34
Troubleshooting chart..................................................8-35
VValve clearance............................................................ 8-22
Vehicle identification number ....................................... 11-1WWheel hub bearings, checking ..................................... 8-28
Wheel, installing ........................................................... 8-33
Wheel, removing .......................................................... 8-32
Seat ........................................................................\
...... 4-11 Vehicle speed limiter ...................................................... 4-4
Speed limiters.................................................................. 4-3