brake YAMAHA YFM250R 2012 Service Manual

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.
U1BT62E0.book Page 1 Tuesday, April 19, 2011 7:06 PM

10-3
10
Gear ratio:1st:
37/13 (2.846)
2nd: 33/18 (1.833)
3rd: 29/21 (1.381)
4th:
27/24 (1.125)
5th: 28/29 (0.966)Chassis:Frame type:
Steel tube frame
Caster angle: 6.0 °
Trail: 23.0 mm (0.91 in)Front tire:Type:Tubeless
Size: AT20 x 7-10
Manufacturer/model:
DUNLOP/KT201Rear tire:Type: Tubeless
Size:
AT19 x 10-9
Manufacturer/model: DUNLOP/KT205A
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/cm ², 4.0 psi)
Rear:
27.5 kPa (0.275 kgf/cm ², 4.0 psi)
Minimum: Front:
24.5 kPa (0.245 kgf/cm ², 3.6 psi)
Rear: 24.5 kPa (0.245 kgf/cm ², 3.6 psi)Front wheel:Wheel type:
Panel wheel
Rim size: 10 x 5.5ATRear wheel:Wheel type:
Panel wheel
Rim size: 9 x 8.0ATFront brake:Type:
Disc brake
Operation: Right hand operation
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10-4
10
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:
190 mm (7.5 in)Rear suspension:Type:Swingarm
Spring/shock absorber type:
Coil spring/gas-oil damper
Wheel travel: 200 mm (7.9 in)Electrical system:Ignition system:
DC CDI
Charging system: AC magnetoBattery:Model:
YTZ7S Voltage, capacity:
12 V, 6.0 Ah
Headlight: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 × 1Fuse:Fuse:
15.0 AEBU30400For EUR only
The figures quoted are emission levels and are not
necessarily safe working levels. Whilst there is a
correlation between the emission and exposure
levels, this cannot be used reliably to determine
whether or not further precautions are required.
Factors that influence the actual level of exposure
of work-force include the characteristics of the
work room, the other sources of noise, etc. i.e. the
number of machines and other adjacent process-
es, and the length of time for which an operator is
U1BT62E0.book Page 4 Tuesday, April 19, 2011 7:06 PM

INDEX
AAccessories and loading ................................................ 6-6
Air filter element, cleaning ............................................ 8-14BBattery .......................................................................... 8-35
Brake and clutch levers, checking and lubricating ....... 8-32
Brake fluid, changing .................................................... 8-25
Brake fluid level, checking ............................................ 8-23
Brake lever ..................................................................... 4-5
Brake lever free play, checking the front ...................... 8-25
Brake light switches ..................................................... 8-27
Brake pads, checking the front and rear ...................... 8-22
Brake pedal .................................................................... 4-5
Brake pedal, checking and lubricating ......................... 8-33
Brake pedal height, checking ....................................... 8-25
Brakes .......................................................................... 8-22
Brakes, front and rear .................................................... 5-3CCables, checking and lubricating ................................. 8-31
Carburetor, adjusting .................................................... 8-20
Chassis fasteners ........................................................... 5-6
Cleaning ......................................................................... 9-1
Clutch lever .................................................................... 4-4
Clutch lever free play, adjusting ................................... 8-28DDrive chain ..................................................................... 5-4
Drive chain, lubricating ................................................. 8-31
Drive chain slack .......................................................... 8-29
EEngine break-in .............................................................. 6-4
Engine, cold start ........................................................... 6-1
Engine idling speed ...................................................... 8-20
Engine oil ....................................................................... 5-3
Engine oil and oil filter element .................................... 8-11
Engine, starting a warm ................................................. 6-2
Engine stop switch ......................................................... 4-2FFuel ......................................................................... 4-8, 5-3
Fuel cock ........................................................................ 4-9
Fuel tank cap .................................................................. 4-7
Fuse, replacing ............................................................. 8-38HHandlebar switches ........................................................ 4-2
Headlight beam, adjusting ............................................ 8-41
Headlight bulb, replacing .............................................. 8-39IIdentification numbers .................................................. 11-1
Indicator light .................................................................. 4-2
Instruments, lights and switches .................................... 5-6LLabel locations ............................................................... 1-1
Light switch .................................................................... 4-3MMain switch .................................................................... 4-1
Maintenance and lubrication chart ................................. 8-5
Maintenance chart, emission control system ................. 8-3
U1BT62E0.book Page 1 Tuesday, April 19, 2011 7:06 PM

Model label ................................................................... 11-2NNeutral indicator light ..................................................... 4-2OOwner’s manual and tool kit ........................................... 8-2PParking ........................................................................... 6-5
Parking brake free play, adjusting ................................ 8-26
Parking brake lever ........................................................ 4-6
Parking on a slope ......................................................... 6-6
Part locations ................................................................. 3-1RRiding your ATV ............................................................. 7-1SSafety information .......................................................... 2-1
Seat .............................................................................. 4-11
Shifting ........................................................................... 6-3
Shift pedal ...................................................................... 4-7
Shift pedal, checking .................................................... 8-33
Shock absorber assemblies, adjusting the front .......... 4-12
Shock absorber assembly, adjusting the rear .............. 4-13
Spark arrester, cleaning ............................................... 8-18
Spark plug, checking ...................................................... 8-9
Specifications ............................................................... 10-1
Speed limiter .................................................................. 4-4
Starter (choke) ............................................................. 4-11
Start switch .................................................................... 4-3
Steering shaft, lubricating ............................................ 8-35
Storage .......................................................................... 9-2
Suspension, lubricating the upper and
lower arm pivots ........................................................ 8-34
Swingarm pivots, lubricating ........................................ 8-34
TTail/brake light bulb, replacing ..................................... 8-41
Throttle lever ........................................................... 4-3, 5-3
Throttle lever free play, adjusting ................................. 8-21
Tires ............................................................................... 5-4
Troubleshooting ........................................................... 8-43
Troubleshooting chart .................................................. 8-44VValve clearance ........................................................... 8-22
Vehicle identification number ....................................... 11-1WWheel hub bearings, checking ..................................... 8-33
Wheel, installing ........................................................... 8-42
Wheel, removing .......................................................... 8-41
U1BT62E0.book Page 2 Tuesday, April 19, 2011 7:06 PM