Yamaha TT-R125 Manuel D'atelier Du Proprietaire page 286

CYLINDER HEAD
REMOVAL POINTS
Cylinder head
1. Align:
"I" mark
G
(with stationary pointer)
Checking steps:
Turn the crankshaft counterclockwise with
G
a wrench.
Align the "I" mark a on the rotor with the
G
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
G
NOTE:
Remove the bolt while holding the rotor nut
with a wrench.
3. Remove:
Bolt (timing chain tensioner cap) 1
G
Bolt (timing chain tensioner) 2
G
Timing chain tensioner 3
G
4 - 14
ENG