Yamaha TW125 1999, Service Manual

Page: 101 / 283

4-7
CYLINDR HEAD
ENG
NOTE:
EAS00225
REMOVING THE CYLINDER HEAD
1. Align:
“I” mark
a
on the generator rotor (with the
stationary pointer b on the crankcase cov-
er)
a. Turn the primary pulley counterclockwise.
b. When the piston is at TDC on the compres-
sion stroke, align the “I” mark
c
on the cam-
shaft sprocket with the mark d on the cylin-
der head.
2. Loosen:
bolt 1
3. Remove:
cap bolt 1
timing chain tensioner 2
(along with the gasket)
camshaft sprocket 3
timing chain 4
To prevent the timing chain from falling into the
crankcase, fasten it with a wire
a
.
While holding the generator rotor bolt with a
wrench, remove the bolt.