Removing The Cylinder Heads - Yamaha XVS250 2001 Service Manual

CYLINDER HEADS

REMOVING THE CYLINDER HEADS

Front cylinder head
1. Remove:
D camshaft sprocket cover
D tappet cover
D timing plug
D straight plug
2. Align:
D "T" mark a on the generator rotor (with the
stationary pointer b on the crank case cov-
er)
a. Turn the crankshaft counterclockwise.
b. Align the "T" mark a with the stationary
pointer b on the crankcase cover (left) when
the rear piston is at TDC on the compression
stroke.
c. Check that the front piston is at TDC in the
compression stroke.
d. The front piston is at TDC on the compres-
sion stroke when there is clearance at both of
the rocker arms. If there is no clearance then
turn the crankshaft counterclockwise one full
turn.
e. When to "T" mark is aligned with the station-
ary pointer the alignment mark c on the
camshaft sprocket should be aligned with the
stationary pointer d on the cylinder head.
3. Loosen:
D bolt (camshaft sprocket) 1
NOTE:
Use the sheave holder 2 to hold the rotor.
Sheave holder:
90890-01701
5-8
ENG