Checking The Timing Chain, Camshaft Sprockets, And Timing Chain Guides; Checking The Timing Chain Tensioner - Yamaha XC50V Service Manual

THE ROCKER ARMS AND CAMSHAFT
1
b
a
2
EAS00208
CHECKING THE TIMING CHAIN, CAMSHAFT
SPROCKETS, AND TIMING CHAIN GUIDES
The following procedure applies to all of the cam-
shaft sprockets and timing chain guides.
1. Check:
8 timing chain
Damage/stiffness
chain and camshaft sprockets as a set.
2. Check:
8 camshaft sprocket
More than 1/4 tooth wear a
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:
8 timing chain guide (exhaust side)
8 timing chain guide (intake side)
Damage/wear
part(s).
EAS00210

CHECKING THE TIMING CHAIN TENSIONER

1. Check:
8 timing chain tensioner
Cracks/damage
2. Check:
8 one-way cam operation
Rough movement
chain tensioner housing.
3. Check:
8 cap bolt
8 o-ring
New
8 spring
8 one-way cam
8 gasket
New
8 timing chain tensioner rod
Damage/wear
part(s).
5-16
ENG
Replace the timing
Replace
Replace the defective
Replace.
Replace the timing
Replace the defective