Yamaha YZ250 Owner's Service Manual page 142

PRE-OPERATION INSPECTION AND MAINTENANCE
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
Coolant
Fuel
Transmission oil
Gear shifter and clutch
Throttle grip/Housing
Brakes
Chain
Wheels
Steering
Front forks and
rear shock absorber
Cables (wires)
Muffler
Sprocket
Lubrication
Bolts and nuts
Lead connectors
Settings
Check that coolant is filled up to the radiator filler cap.
Check the cooling system for leakage.
Check that a fresh mixture of oil and gasoline is filled in
the fuel tank. Check the fuel line for leakage.
Check that the oil level is correct. Check the crankcase
for leakage.
Check that gears can be shifted correctly in order and
that the clutch operates smoothly.
Check that the throttle grip operation and free play
are correctly adjusted. Lubricate the throttle grip and
housing, if necessary.
Check the play of front brake and effect of front and
rear brake.
Check chain slack and alignment. Check that the chain
is lubricated properly.
Check for excessive wear and tire pressure. Check for
loose spokes and have no excessive play.
Check that the handlebar can be turned smoothly and
have no excessive play.
Check that they operate smoothly and there is no oil
leakage.
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.
Check that the muffler is tightly mounted and has no
cracks.
Check that the driven sprocket tightening bolt is
not loose.
Check for smooth operation. Lubricate if necessary.
Check the chassis and engine for loose bolts and nuts.
Check that the CDI magneto, CDI unit, and ignition coil
are connected tightly.
Is the machine set suitably for the condition of the
racing course and weather or by taking into account the
results of test runs before racing? Are inspection and
maintenance completely done?
Routine
3-4
INSP
ADJ
Page
P3-5~9
P1-12
P3-12~14
P3-9
P3-10~11
P3-17~23
P3-24~26
P3-34~35
P3-35~36
P3-26~33
—
P3-15~16
P3-24
P3-37
P1-16
P1-6
P7-1~24