Yamaha YFM45FAR, Service Manual

Page: 148 / 405

4 - 10
ENG
CYLINDER HEAD
REMOVING THE CYLINDER HEAD
1.Align:
●
“T” mark
(with stationary pointer)
*****************************************************
Checking steps:
●
Turn the crankshaft counterclockwise with a
wrench.
●
Align the “T” mark
1
on the rotor with the
stationary pointer
2
on the crankcase cover.
When the “T” mark is aligned with the
stationary pointer, the piston is at the Top
Dead Center (T.D.C.).
NOTE:
●
When the piston is at the Top Dead Center
(T.D.C.) on the compression stroke, there
should be clearance between the valve stem
tips and their respective rocker arm adjusting
screws.
●
If there is no clearance, rotate the crankshaft
counterclockwise one turn.
*****************************************************
2.Loosen:
●
Camshaft sprocket bolt
1
NOTE:
Use the rotor holding tool
2
to hold the starter
pulley.
Rotor holding tool:
P/N. YU-01235, 90890-01235
3.Loosen:
●
Timing chain tensioner cap bolt
4.Remove:
●
Timing chain tensioner
●
Camshaft sprocket