Checking The Timing Chain, Camshaft Sprockets, And Timing Chain Guides; Checking The Timing Chain Tensioner - Yamaha FZ6-ST Supplementary Service Manual

CAMSHAFTS
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:
S timing chain 1
Damage/stiffness ! Replace the timing
chain and camshaft sprockets as a set.
2. Check:
S 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:
S timing chain guide (exhaust side) 1
S timing chain guide (intake side) 2
S timing chain guide (top side) 3
Damage/wear ! Replace the defective
part(s).
EAS00210

CHECKING THE TIMING CHAIN TENSIONER

1. Check:
S timing chain tensioner
Cracks/damage ! Replace.
2. Check:
S one-way cam operation
Rough movement ! Replace the timing
chain tensioner assembly.
a. Lightly press the timing chain tensioner rod
into the timing chain tensioner housing by
hand.
NOTE:
While pressing the timing chain tensioner rod,
wind it clockwise with a thin screwdriver 1 until
it stops.
5-14
ENG