Checking The Valve Lifters - Yamaha MX800V Service Manual

PISTONS, CAMSHAFT, CRANKCASE, AND CRANKSHAFT
a
b
a
2.
Check:
• Camshaft lobe dimensions "a" and "b"
Camshaft lobe dimensions
Out of specification  Replace.
3.
Check:
• Surface of camshaft gear teeth
Crack/damage/wear  Replace.
4.
Check:
a
• Camshaft journal diameter "a"
Camshaft journal diameter:
Limit:
Out of specification  Replace.

CHECKING THE VALVE LIFTERS

The following procedure applies to all of the valve lifters.
3-43
Lobe height "a" (Intake):
32.885 mm (1.2947 in)
Limit:
32.785 mm (1.2907 in)
Lobe height "a" (Exhaust):
33.957 mm (1.3369 in)
Limit:
33.857 mm (1.3330 in)
Base circle diameter "b" (Intake):
26.000 mm (1.0236 in)
Limit:
25.900 mm (1.0197 in)
Base circle diameter "b" (Exhaust):
26.000 mm (1.0236 in)
Limit:
25.900 mm (1.0197 in)
16.965–16.990 mm (0.6679–0.6689 in)
16.950 mm (0.6673 in)
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