Checking The Timing Chain, Camshaft Sprockets, And Timing Chain Guides - Yamaha YZF-R1 1998 Service Manual

CAMSHAFTS
NOTE:
• Tighten the camshaft cap bolts in
stages and in a crisscross pattern,
working from the inner caps out.
• Do not turn the camshaft when mea-
suring the camshaft-journal-to-cam-
shaft-cap
Plastigauge
Camshaft cap bolt
10 Nm (1.0 m • kg)
d. Remove the camshaft caps and then
measure the width of the Plasti-
®
gauge 1.
5. Measure:
• camshaft journal diameter a
Out of specification → Replace the
camshaft.
Within specification → Replace the cyl-
inder head and the camshaft caps as a
set.
Camshaft journal diameter
24.437 ~ 24.450 mm
EB401421
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 tim-
ing chain and camshaft sprockets as a
set.
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ENG
clearance with
®
.
the