Yamaha Bicycle WR45OFR User Manual

 

3 - 1

 

EC300000

 

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 

break-in

Every 

race

 

Every 

third 

(or 

500 km)

Every 

fifth 

(or 

1,000 km)

 

As re-

quired

Remarks

ENGINE OIL

Replace

 

●

 

 

 

●

 

 

VALVES

Check the valve clearances
Inspect
Replace

 

●

 

 

 

●

 

 

 

●

 

 

 

●

 

 

The engine must be cold.
Check the valve seats 
and valve stems for wear.

VALVE SPRINGS

Inspect
Replace

 

●

 

 

 

●

 

 

Check the free length and 
the tilt.

VALVE LIFTERS

Inspect
Replace

 

●

 

 

 

●

 

 

Check for scratches and 
wear.

CAMSHAFTS

Inspect
Replace

 

●

 

 

 

●

 

 

Inspect the camshaft sur-
face.
Inspect the decompres-
sion system

CAMSHAFT SPROCKETS

Inspect
Replace

 

●

 

 

 

●

 

 

Check for wear on the 
teeth and for damage.

PISTON

Inspect 
Clean
Replace

 

●

 

 

 

●

 

 

 

●

 

 

 

●

 

 

Inspect crack
Inspect carbon deposits 
and eliminate them.

PISTON RING

Inspect
Replace

 

●

 

 

 

●

 

 

 

●

 

 

Check ring end gap

PISTON PIN

Inspect
Replace

 

●

 

 

 

●

 

 

CYLINDER HEAD

Inspect and clean

 

●

 

 

Inspect carbon deposits 
and eliminate them.
Change gasket

CYLINDER

Inspect and clean
Replace

 

●

 

 

 

●

 

 

Inspect score marks
Inspect wear

CLUTCH

Inspect and adjust
Replace

 

●

 

 

 

●

 

 

 

●

 

 

Inspect housing, friction 
plate, clutch plate and 
spring

TRANSMISSION

Inspect
Replace bearing

 

●

 

 

 

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