Yamaha YZ250(W)/W1, Owner'S Service Manual

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3-4
PRE-OPERATION INSPECTION AND MAINTENANCE
INSP
ADJ
EC320000
PRE-OPERATION INSPECTION AND MAINTENANCE
Before riding for break-in operation, practice or a race, make sure the machine is in good operating
condition.
Before using this machine, check the following points.
EC321000
GENERAL INSPECTION AND MAINTENANCE
Item Routine Page
Coolant Check that coolant is filled up to the radiator filler cap.
Check the cooling system for leakage.
P3-5~9
Fuel Check that a fresh mixture of oil and gasoline is filled in
the fuel tank. Check the fuel line for leakage.
P1-12
Transmission oil Check that the oil level is correct. Check the crankcase
for leakage.
P3-12~14
Gear shifter and clutch Check that gears can be shifted correctly in order and
that the clutch operates smoothly.
P3-9
Throttle grip/Housing Check that the throttle grip operation and free play
are correctly adjusted. Lubricate the throttle grip and
P3-10~11
housing, if necessary.
Brakes Check the play of front brake and effect of front and
rear brake.
P3-17~23
Chain Check chain slack and alignment. Check that the chain
is lubricated properly.
P3-24~26
Wheels Check for excessive wear and tire pressure. Check for
loose spokes and have no excessive play.
P3-34~35
Steering Check that the handlebar can be turned smoothly and
have no excessive play.
P3-35~37
Front forks and Check that they operate smoothly and there is no oil
rear shock absorber leakage.
P3-26~33
Cables (wires) Check that the clutch and throttle cables move smooth-
ly. Check that they are not caught when the handlebars
—
are turned or when the front forks travel up and down.
Muffler Check that the muffler is tightly mounted and has no
cracks.
P3-15~16
Sprocket Check that the driven sprocket tightening bolt is
not loose.
P3-24
Lubrication Check for smooth operation. Lubricate if necessary. P3-38
Bolts and nuts Check the chassis and engine for loose bolts and nuts. P1-16
Lead connectors Check that the CDI magneto, CDI unit, and ignition coil
are connected tightly.
P1-6
Settings Is the machine set suitably for the condition of the
racing course and weather or by taking into account the
P7-1~22
results of test runs before racing? Are inspection and
maintenance completely done?
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