2009 YAMAHA YFM50R tire pressure

8-5
1
2
3
4
5
6
78
9
10
11

EBU21864
General maintenance and lubrication chart
NO. ITEMCHECK OR MAINTENANCE
JOBINITIAL EVERY
Whichev-
er comes
firstmonth 1 3 6 6 12
km
(mi)320
(200)1300
(800)2500
(1600)2500
(1600)5000
(3200)
hours 20 80 160 160 3201
*
Timing chain


Check chain tension.

Adjust if necessary.
√ √√√
2 Air filter element

Clean and replace if necessary.Every 20–40 hours (more often in wet or
dusty areas)
3
*
Front brake

Check operation and correct if necessary.

Check brake lever free play and adjust if neces-
sary.
√√√√√

Replace brake shoes. Whenever worn to the limit
4
*
Rear brake

Check operation and correct if necessary.

Check brake lever free play and adjust if neces-
sary.
√√√√√

Replace brake shoes. Whenever worn to the limit
5
*
Wheels

Check runout and for damage, and replace if nec-
essary.
√ √√√
6
*
Tires


Check tread depth and for damage, and replace if
necessary.

Check air pressure and balance, and correct if
necessary.
√ √√√
7
*
Wheel hub bearings


Check for looseness or damage, and replace if
necessary.
√ √√√
8
*
Chassis fasteners


Make sure that all nuts, bolts, and screws are
properly tightened.
√√√√√

9-3
1
2
3
4
5
6
7
89
10
11

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 in-
formation on storing the battery, see page
8-26.
TIP

Make any necessary repairs before storing the
ATV.

10-3
1
2
3
4
5
6
7
8
910
11

Secondary reduction ratio:
19/18
×
34/10 (3.588)
Transmission type:
Constant mesh 1-speed
Operation:
Left hand operation
1st:
38/14 (2.714)
Chassis:
Frame type:
Steel tube frame
Caster angle:
1.0 °
Trail:
3.4 mm (0.13 in)
Front tire:
Type:
Tubeless
Size:
AT16 x 7-7
Manufacturer/model:
DUNLOP/KT145
Rear tire:
Type:
Tubeless
Size:
AT16 x 8-7
Manufacturer/model:
DUNLOP/KT145
Loading:
Maximum loading limit:
40.0 kg (88 lb)
(Total weight of rider, cargo, accessories, and tongue)
Tire air pressure (measured on cold tires):
Recommended:
Front:
20 kPa (0.200 kgf/cm
2

, 2.9 psi)
Rear:
20 kPa (0.200 kgf/cm
2

, 2.9 psi)
Minimum:
Front:
17 kPa (0.170 kgf/cm
2

, 2.5 psi)
Rear:
17 kPa (0.170 kgf/cm
2

, 2.5 psi)
Front wheel:
Wheel type:
Panel wheel
Rim size:
7 x 5.5AT
Rear wheel:
Wheel type:
Panel wheel
Rim size:
7 x 6.5AT
Front brake:
Type:
Drum brake
Operation:
Right hand operation

O
Owner’s manual and tool kit............................................8-1
P
Parking ............................................................................6-5
Parking brake ..................................................................4-6
Parking on a slope ..........................................................6-6
Part locations ..................................................................3-1
Pre-operation check list ..................................................5-1
R
Riding your ATV ..............................................................7-1
S
Safety information ...........................................................1-1
Seat...............................................................................4-11
Shifting ............................................................................6-3
Spark arrester, cleaning ................................................8-17
Spark plug, checking.......................................................8-8
Specifications ................................................................10-1
Speed limiter ...................................................................4-5
Start switch .....................................................................4-2
Steering shaft, lubricating .............................................8-26
Storage ...........................................................................9-2
T
Throttle cable free play, checking .................................8-19
Throttle lever ...........................................................4-4
,
5-4
Tire pressure, measuring ................................................5-5
Tires ................................................................................5-4
Tire wear limit..................................................................5-6
Troubleshooting ............................................................8-31
Troubleshooting chart ...................................................8-32
V
Valve clearance ........................................................... 8-19
Vehicle identification number ....................................... 11-1
W
Wheel hub bearings, checking ..................................... 8-25
Wheel, installing ........................................................... 8-30
Wheel, removing .......................................................... 8-29