Yamaha YFM4FAR, Service Manual

Page: 144 / 397

4 - 14
ENG
CYLINDER HEAD
NOTE:
Be sure the “I” mark
5
on the camshaft
sprocket is aligned with the match mark
2
on
the cylinder head.
●
Force the camshaft clockwise and
counterclockwise to remove timing chain slack.
●
Insert a screwdriver into the timing chain
tensioner hole and push the timing chain
guide inward.
●
While pushing the timing chain guide, be sure
that the camshaft sprocket “I” mark
5
is
aligned with the cylinder head match mark
2
.
●
If the marks are aligned, tighten the camshaft
sprocket bolt. If the marks are not aligned,
change the meshing position of the camshaft
sprocket and timing chain.
*****************************************************
3.Install:
●
Timing chain tensioner
*****************************************************
Installation steps:
●
Remove the tensioner cap bolt
1
, washer
2
and spring
3
.
●
Release the timing chain tensioner one-way
cam
4
and push the tensioner rod
5
all the
way in.
●
Install the tensioner
6
with a new gasket into
the cylinder.
WARNING
Always use a new gasket.
●
Install the spring, washer and cap bolt.
*****************************************************
T
R
.
.
Bolts (timing chain tensioner):
11 Nm (1.1 m • kg, 8.0 ft • lb)
T
R
.
.
Cap bolt (timing chain tensioner):
23 Nm (2.3 m • kg, 17 ft • lb)