Valve Lifter; Timing Chain, Sprocket And Chain Guide - Yamaha TTR250L Service Manual

INSPECTION AND REPAIR
NB643006

VALVE LIFTER

1.Inspect:
Valve lifters
Scratches/damage → Replace both lifters
and camshaft case.
NB643007
TIMING CHAIN, SPROCKET AND CHAIN
GUIDE
1.Inspect:
Timing chain
Stiff/cracks → Replace the timing chain
and the sprockets as a set.
2.Inspect:
Cam sprocket
Wear/damage → Replace the cam sprock-
ets and the timing chain as a set.
1 1/4 tooth
2 Correct
3 Roller
4 Sprocket
3.Inspect:
Chain guide 1 (exhaust side)
Chain guide 2 (intake side)
Wear/damage → Replace.
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ENG