Pre-Operation Inspection And Maintenance; General Inspection And Maintenance - Yamaha YZ250F Owner's Service Manual

PRE-OPERATION INSPECTION AND MAINTENANCE

PRE-OPERATION INSPECTION AND MAINTENANCE
EAS1SM5068
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

EAS1SM5069
ITEM
Coolant
Fuel
Engine oil
Gear shifter and clutch
Throttle grip/Housing
Brakes
Drive chain
Wheels
Steering
Front forks and rear
shock absorber
Cables (wires)
Exhaust pipe
Rear wheel sprocket
Lubrication
Bolts and nuts
Lead connectors
Settings
TIP
Perform usual maintenance enough so that, in the race course, a confirmation of that and simple set-
ting adjustments may only be left, in order to get enough time to use effectively.
Check that coolant is filled up to the radiator cap.
Check the cooling system for leakage.
Check that a fresh gasoline is filled in the fuel tank.
Check the fuel line for leakage.
Check that the oil level is correct. Check the crank-
case and oil line 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 drive chain slack and alignment. Check that
the drive 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
smoothly. Check that they are not caught when the
handlebars are turned or when the front forks travel
up and down.
Check that the exhaust pipe is tightly mounted and
has no cracks.
Check that the rear wheel 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 AC magneto, ECU and ignition coil are
connected tightly.
Is the machine set suitably for the condition of the rac-
ing course and weather or by taking into account the
results of test runs before racing? Are inspection and
maintenance completely done?
inspect
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Page
3-8 – 10
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4-8 – 9
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