3-1
MAINTENANCE INTERVALS
REGULAR INSPECTION AND ADJUSTMENTS
MAINTENANCE INTERVALS
• 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
• Periodic inspection is essential in making full use of the machine performance. The service life of the parts varies sub-
stantially according to the environment in which the machine runs (e.g., rain, dirt, etc.). Therefore, earlier inspection is
required by reference to the list below.
Item
After
break-
in
Every
race
(about
2.5
hours)
Every
third
(about
7.5
hours)
Every
fifth
(about
12.5
hours)
As re-
quired
Remarks
ENGINE OIL
Replace
●
●
Inspect
●
●
OIL FILTER ELEMENT, OIL
STRAINER
Clean
●
VALVES
Check the valve clearances
●
●
The engine must be cold.
Inspect
●
Check the valve seats and valve
stems for wear.
Replace
●
VALVE SPRINGS
Inspect
●
Check the free length and the tilt.
Replace
●
VALVE LIFTERS
Inspect
●
Check for scratches and wear.
Replace
●
CAMSHAFTS
Inspect the camshaft surface.
Inspect
●
Inspect the decompression system.
Replace
●
TIMING CHAIN SPROCKETS,
TIMING CHAIN
Inspect
●
Check for wear on the teeth and for
damage.
Replace
●
PISTON
Inspect
●
●
Inspect crack.
Clean
●
Inspect carbon deposits and eliminate
them.
Replace
●
It is recommended that the piston pin
and ring are also replaced at the same
time.
PISTON RING
Inspect
●
Check ring end gap.
Replace
●
●
3
Summary of Contents for YZ250F(Z)
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Page 13: ...1 3 LOCATION OF IMPORTANT LABELS AUS NZ ZA...
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