Yamaha YZF-R1S Service Manual - Eng
5-17
CAMSHAFT
ENG
NOTE:
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:
Stiming chain
1
Damage / stiffness
! Replace the timing
chain and camshaft sprockets as a set.
2. Check:
Scamshaft 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:
Stiming chain guide (exhaust side)
1
Stiming chain guide (intake side)
2
Stiming chain guide (top side)
3
Damage / wear
! Replace the defective
part(s).
CHECKING THE TIMING CHAIN TENSIONER
1. Remove:
Stiming chain tensioner housing
1
Stiming chain tensioner rod
2
Stiming chain tensioner spring
3
Squeeze the timing chain tensioner clip, and
then remove the timing chain tensioner spring
and timing chain tensioner rod.
2. Check:
Stiming chain tensioner housing
Stiming chain tensioner rod
Stiming chain tensioner spring
Damage / wear
! Replace.