Yamaha YZF-R1P 2001-2003, Service Manual

Page: 250 / 439

5 - 14
ENG
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).