Yamaha YZ250F(Z), Owner'S Service Manual

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PRE-OPERATION INSPECTION AND MAINTENANCE
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.
GENERAL INSPECTION AND MAINTENANCE
Item Routine Page
Coolant
Check that coolant is filled up to the radiator cap. Check the cool-
ing system for leakage.
P.3-6 – 7
Fuel
Check that a fresh gasoline is filled in the fuel tank. Check the fuel
line for leakage.
P.1-13
Engine oil
Check that the oil level is correct. Check the crankcase and oil line
for leakage.
P.3-9 – 10
Gear shifter and clutch
Check that gears can be shifted correctly in order and that the
clutch operates smoothly.
P.3-7
Throttle grip/Housing
Check that the throttle grip operation and free play are correctly
adjusted. Lubricate the throttle grip and housing, if necessary.
P.3-7 – 8
Brakes Check the play of front brake and effect of front and rear brake. P.3-14 – 16
Drive chain
Check drive chain slack and alignment. Check that the drive chain
is lubricated properly.
P.3-17 – 18
Wheels
Check for excessive wear and tire pressure. Check for loose
spokes and have no excessive play.
P.3-20 – 21
Steering
Check that the handlebar can be turned smoothly and have no ex-
cessive play.
P.3-21 – 22
Front forks and rear shock
absorber Check that they operate smoothly and there is no oil leakage.
P.3-18 – 20
Cables (wires)
Check that the clutch and throttle cables move smoothly. Check
that they are not caught when the handlebars are turned or when
the front forks travel up and down.
—
Exhaust pipe Check that the exhaust pipe is tightly mounted and has no cracks. P.4-3 – 4
Rear wheel sprocket Check that the rear wheel sprocket tightening bolt is not loose. P.3-17
Lubrication Check for smooth operation. Lubricate if necessary. P.3-23
Bolts and nuts Check the chassis and engine for loose bolts and nuts. P.1-15
Lead connectors
Check that the CDI magneto, CDI unit, and ignition coil are con-
nected tightly.
P.1-7
Settings
Is the machine set suitably for the condition of the racing course
and weather or by taking into account the results of test runs be-
fore racing? Are inspection and maintenance completely done?
P.7-1 – 10