Checking The Timing Chain, Camshaft Sprockets, And Timing Chain Guides - Yamaha YZF-R1P Service Manual

CAMSHAFT
5. Measure:
• camshaft journal diameter a
Out of specification → Replace the cam-
shaft.
Within specification → Replace the cylinder
head and the camshaft caps as a set.
Camshaft journal diameter
24.459 ~ 24.472 mm
(0.9630 ~ 0.9635 in)
EAS00208
CHECKING THE TIMING CHAIN,
CAMSHAFT SPROCKETS, AND TIMING
CHAIN GUIDES
The following procedure applies to all of the
camshaft sprockets and timing chain guides.
1. Check:
• timing chain 1
Damage/stiffness → Replace the timing
chain and camshaft sprockets as a set.
2. Check:
• camshaft sprocket
More than 1/4 tooth wear a → Replace the
camshaft sprockets and the timing chain as
a set.
a 1/4 tooth
b Correct
1 Timing chain roller
2 Camshaft sprocket
3. Check:
• timing chain guide (exhaust side)1
• timing chain guide (intake side)2
• timing chain guide (top side)3
Damage/wear → Replace the defective
part(s).
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ENG