wheel YAMAHA YFM350R 2011 Owner's Manual

8-34
8Brake pedal
Shift pedal
EBU24963Checking the wheel hub bearings The front and rear wheel hub bearings must be
checked at the intervals specified in the periodic
maintenance and lubrication chart. If there is play
in a wheel hub or if a wheel does not turn smoothly,
have a Yamaha dealer check the wheel hub bear-
ings.EBU24995Lubricating the swingarm pivots The swingarm pivots must be lubricated by a
Yamaha dealer at the intervals specified in the pe-
riodic maintenance and lubrication chart.
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8-43
8
EBU25601Replacing the tail/brake light bulb If the tail/brake light bulb burns out, replace it as
follows.
1. Remove the lens by removing the screws.
2. Remove the burnt-out bulb by pushing it in
and turning it counterclockwise.3. Insert a new bulb into the socket, push it in,
and then turn it clockwise until it stops.
4. Install the lens by installing the screws.
NOTICE: Do not overtighten the screws,
otherwise the lens may break.
[ECB00701]
EBU25651
Removing a wheel 1. Place the ATV on a level surface.
2. Loosen the wheel nuts.
1. Screw
1. Tail/brake light bulb
U1BS61E0.book Page 43 Tuesday, April 13, 2010 10:25 AM

8-44
83. 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.
EBU25720Troubleshooting 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.
The following troubleshooting chart represents a
quick and easy procedure for checking these vital
systems yourself. However, should your ATV re-
quire any repair, take it to a Yamaha dealer, whose
skilled technicians have the necessary tools, expe-
rience, and know-how to service the ATV properly.
Use only genuine Yamaha replacement parts. Im-
itation parts may look like Yamaha parts, but they
are often inferior, have a shorter service life and
can lead to expensive repair bills.
1. Wheel nut
Tightening torques:
Fro nt wh ee l nu t:
45 Nm (4.5 m·kgf, 33 ft·lbf)
Rear wheel nut:
45 Nm (4.5 m·kgf, 33 ft·lbf)
U1BS61E0.book Page 44 Tuesday, April 13, 2010 10:25 AM

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 to
prevent 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 pressuremay 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)U1BS61E0.book Page 2 Tuesday, April 13, 2010 10:25 AM

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
8-37.
TIPMake any necessary repairs before storing the
ATV.U1BS61E0.book Page 3 Tuesday, April 13, 2010 10:25 AM

10-1
10
EBU25960
SPECIFICATIONS
Dimensions:Overall length:
1780 mm (70.1 in)
Overall width:
1095 mm (43.1 in)
Overall height:
1080 mm (42.5 in)
Seat height:
820 mm (32.3 in)
Wheelbase:
1210 mm (47.6 in)
Ground clearance:
115 mm (4.5 in)
Minimum turning radius:
3100 mm (122 in)Weight:With oil and fuel:
180.0 kg (397 lb)Noise and vibration level:Noise level (77/311/EEC):
YFM35RA 84.3 dB(A)@3500 r/min
Noise level 40 CFR Part 205 Subpart D (Acceleration):
YFM35RA 79.3 dB(A)
Vibration on seat (EN1032, ISO5008):
YFM35RA Will not exceed 0.5 m/s²
Vibration on handlebar (EN1032, ISO5008):
YFM35RA Will not exceed 2.5 m/s²
Engine:Engine type:
Air cooled 4-stroke, SOHC
Cylinder arrangement:
Forward-inclined single cylinder
Displacement:
349 cm³
Bore × stroke:
83.0 × 64.5 mm (3.27 × 2.54 in)
Compression ratio:
9.20 :1
Starting system:
Electric starter
Lubrication system:
Wet sumpEngine oil:Recommended brand:
YAMALUBE
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10-3
10
Gear ratio:
1st:
36/16 (2.685)
2nd:
33/20 (1.969)
3rd:
29/23 (1.504)
4th:
27/26 (1.239)
5th:
25/28 (1.065)
6th:
23/29 (0.946)
Forward gear:
20/27 × 29/18
Reverse gear:
33/16 × 33/10 (6.806)Chassis:Frame type:
Steel tube frame
Caster angle:
6.0 °
Trail:
26.0 mm (1.02 in)Front tire:Type:
Tubeless
Size:
AT21 x 7-10
Manufacturer/model:
DUNLOP/KT851B
Rear tire:Type:
Tubeless
Size:
AT20 x 10-9
Manufacturer/model:
DUNLOP/KT877ALoading: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/cm², 3.6 psi)
Rear:
25.0 kPa (0.250 kgf/cm², 3.6 psi)
Minimum:
Front:
22.0 kPa (0.220 kgf/cm², 3.2 psi)
Rear:
22.0 kPa (0.220 kgf/cm², 3.2 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:
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/oil damper
Wheel travel:
200 mm (7.9 in)Rear suspension:Type:
Swingarm (link suspension)
Spring/shock absorber type:
Coil spring/gas-oil damper
Wheel travel:
210 mm (8.3 in)
Electrical system:Ignition system:
DC CDI
Charging system:
AC magnetoBattery:Model:
YTZ10S
Voltage, capacity:
12 V, 8.6 AhHeadlight:Bulb type:
Krypton bulbBulb voltage, wattage × quantity:Headlight:
12 V, 30/30 W × 2
Tail/brake light:
12 V, 5.0/21.0 W × 1
Neutral indicator light:
12 V, 1.7 W × 1
Reverse indicator light:
12 V, 1.7 W × 1Fuse:Fuse:
15.0 A
U1BS61E0.book Page 4 Tuesday, April 13, 2010 10:25 AM

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 ........................................................................... 6-7
Parking brake free play, adjusting ................................ 8-26
Parking brake lever ........................................................ 4-6
Parking on a slope ......................................................... 6-7
Part locations ................................................................. 3-1RReverse indicator light ................................................... 4-2
Riding your ATV ............................................................. 7-1SSafety information .......................................................... 2-1
Seat .............................................................................. 4-12
Shifting ........................................................................... 6-4
Shift pedal ...................................................................... 4-7
Shock absorber assemblies, adjusting the front .......... 4-13
Shock absorber assembly, adjusting the rear .............. 4-14
Spark arrester, cleaning ............................................... 8-18
Spark plug, checking ...................................................... 8-9
Specifications ............................................................... 10-1
Speed limiter .................................................................. 4-3
Starter (choke) ............................................................. 4-11
Start switch .................................................................... 4-3
Steering shaft, lubricating ............................................ 8-37
Storage .......................................................................... 9-2Suspension, lubricating the upper and
lower arm pivots ........................................................ 8-36
Suspension relay arm and connecting arm pivoting
points, lubricating the rear ......................................... 8-35
Swingarm pivots, lubricating ........................................ 8-34
TTail/brake light bulb, replacing ..................................... 8-43
Throttle cable free play, adjusting ................................ 8-21
Throttle lever ........................................................... 4-3, 5-3
Tires ............................................................................... 5-4
Troubleshooting ........................................................... 8-44
Troubleshooting chart .................................................. 8-46VValve clearance ........................................................... 8-22
Vehicle identification number ....................................... 11-1WWheel hub bearings, checking ..................................... 8-34
Wheel, installing ........................................................... 8-44
Wheel, removing .......................................................... 8-43
U1BS61E0.book Page 2 Tuesday, April 13, 2010 10:25 AM