Yamaha XVS6501997, Service Manual

Page: 115 / 327

4-11
CYLINDER HEADS
ENG
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NOTE:
NOTE:
CYLINDER HEAD REMOVAL
Rear cylinder head
1. Align:
S
“T” mark
(with the stationary pointer)
Removal steps:
D
Temporarily install the AC magneto cover
without the pickup coil and stator coil.
D
Turn the crankshaft clockwise.
D
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.
D
When the “T” mark is aligned with the station-
ary pointer the punch mark
c
on the cam-
shaft sprocket should be aligned with the sta-
tionary pointer
d on the cylinder head.
D
The rear piston is at TDC on the compression
stroke when there is clearance at both of the
rocker arms. If there is no clearance then turn
the crankshaft clockwise one full turn.
D
Check that the rear piston is at TDC in the
compression stroke.
2. Loosen:
S
Bolt (camshaft sprocket) 1
Use the sheave holder 2 to hold the rotor.
Sheave holder:
90890-01701
3. Loosen:
S
Cap bolt (timing chain tensioner)
4. Remove:
S
Timing chain tensioner
S
Gasket
5. Remove:
S
Bolt (camshaft sprocket) 1
S
Camshaft sprocket plate 2
(only rear)
S
Camshaft sprocket 3
To prevent the timing chain from falling into the
crankcase fasten a wire to it.