Yamaha TTR125LM, Owner'S Service Manual

Page: 212 / 468

4 - 14
ENG
CYLINDER HEAD
REMOVAL POINTS
Cylinder head
1. Align:
●
“I” mark
(with stationary pointer)
Checking steps:
●
Turn the crankshaft counterclockwise with
a wrench.
●
Align the “I” mark
a
on the rotor with the
stationary pointer
b
on the crankcase
cover. When the “I” mark is aligned with
the stationary pointer, the piston is at the
Top Dead Center (T.D.C.).
NOTE:
In order to be sure that the piston is at Top
Dead Center, the match mark
c
on the
camshaft sprocket must align with the sta-
tionary pointer
d
on the cylinder head as
shown in the illustration.
2. Loosen:
●
Camshaft sprocket bolt
1
NOTE:
Remove the bolt while holding the rotor nut
with a wrench.
3. Remove:
●
Bolt (timing chain tensioner cap) 1
●
Bolt (timing chain tensioner) 2
●
Timing chain tensioner 3