Yamaha MX250 - Removing the Camshaft and Valve Lifter; Checking the Camshaft

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ENGINE
PISTON, CAMSHAFT, CRANKCASE, AND CRANKSHAFT
REMOVING THE CAMSHAFT AND VALVE LIFTER
1.
Remove:
• Camshaft “1”
TIP
Remove the camshaft “1” when the camshaft gear mark
“b” and the crankshaft gear mark “a” are aligned.
2.
Remove:
• Intake valve lifter “1”
• Exhaust valve lifter “2”
CHECKING THE CAMSHAFT
1.
Check:
• Camshaft
Crack/damage/wear  Replace.
2.
Check:
• Camshaft lobe dimensions “a” and “b”
b
a
1
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2
a
b