MAINTENANCE INTERVALS

EC300000

REGULAR INSPECTION AND ADJUSTMENTS

MAINTENANCE INTERVALS

INSP

ADJ

The following schedule is intended as a general guide to maintenance and lubrication. Bear in mind that such factors as weather, terrain, geographical location, and individual usage will alter the required maintenance and lubrication intervals. If you are a doubt as to what intervals to follow in maintaining and lubricating your machine, consult your Yamaha dealer.

Item

After

Every

Every third

Every fifth

As re-

Remarks

break-in

race

(or

(or

quired

 

500 km)

1,000 km)

 

ENGINE OIL

 

 

 

 

 

 

Replace

 

 

 

 

 

 

Inspect

 

 

 

 

 

 

 

 

 

 

 

 

 

VALVES

 

 

 

 

 

 

Check the valve clearances

 

 

 

 

 

The engine must be cold.

Inspect

 

 

 

 

 

Check the valve seats

Replace

 

 

 

 

 

and valve stems for wear.

 

 

 

 

 

 

 

VALVE SPRINGS

 

 

 

 

 

 

Inspect

 

 

 

 

 

Check the free length and

Replace

 

 

 

 

 

the tilt.

 

 

 

 

 

 

 

VALVE LIFTERS

 

 

 

 

 

 

Inspect

 

 

 

 

 

Check for scratches and

Replace

 

 

 

 

 

wear.

 

 

 

 

 

 

 

CAMSHAFTS

 

 

 

 

 

Inspect the camshaft sur-

Inspect

 

 

 

 

 

face.

Replace

 

 

 

 

 

Inspect the decompres-

 

 

 

 

 

 

sion system.

TIMING CHAIN SPROCKETS, TIMING

 

 

 

 

 

 

CHAIN

 

 

 

 

 

 

Inspect

 

 

 

 

 

Check for wear on the

Replace

 

 

 

 

 

teeth and for damage.

 

 

 

 

 

 

 

PISTON

 

 

 

 

 

 

Inspect

 

 

 

 

 

Inspect crack

Clean

 

 

 

 

 

Inspect carbon deposits

Replace

 

 

 

 

 

and eliminate them.

 

 

 

 

 

 

 

PISTON RING

 

 

 

 

 

 

Inspect

 

 

 

 

 

Check ring end gap

Replace

 

 

 

 

 

 

 

 

 

 

 

 

 

PISTON PIN

 

 

 

 

 

 

Inspect

 

 

 

 

 

 

Replace

 

 

 

 

 

 

CYLINDER HEAD

 

 

 

 

 

Inspect carbon deposits

Inspect and clean

 

 

 

 

 

and eliminate them.

 

 

 

 

 

 

Change gasket

 

 

 

 

 

 

 

CYLINDER

 

 

 

 

 

 

Inspect and clean

 

 

 

 

 

Inspect score marks

Replace

 

 

 

 

 

Inspect wear

CLUTCH

 

 

 

 

 

Inspect housing, friction

Inspect and adjust

 

 

 

 

 

plate, clutch plate and

Replace

 

 

 

 

 

spring

 

 

 

 

 

 

 

TRANSMISSION

 

 

 

 

 

 

Inspect

 

 

 

 

 

 

Replace bearing

 

 

 

 

 

 

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Image 66
Yamaha WR250FM service manual Insp ADJ, Maintenance Intervals