Yamaha 1999 XVS1100, Service Manual

Page: 63 / 355

3-7
ADJUSTING THE VALVE CLEARANCE
INSP
ADJ
A B
a
b
a. Turn the crankshaft counterclockwise.
b. When the piston is at TDC on the compres-
sion stroke, align either the camshaft sprock-
et plate hole
a
with the stationary pointer b
on the cylinder head. When the camshaft
sprocket plate hole or camshaft sprocket
punch mark is aligned with the stationary
pointer, the piston is at top dead center
(TDC).
c. Align the TDC mark
c
on the generator rotor
with the stationary pointer d on the crank-
case.
A Rear cylinder (“TI” mark)
B Front cylinder (“I” mark)
d. Measure the valve clearance with a thick-
ness gauge 1 .
e. Turn the crankshaft crockwise 290
_
, and
then measure the front cylinder.
10. Adjust
S
valve clearance
a. Loosen the locknut 1 .
b. Insert a thickness gauge between the end of
the adjusting screw and the valve tip.
c. Turn the adjusting screw 2 in direction
a
or
b until the specified valve clearance is ob-
tained.
Direction
Valve clearance is
decreased.
Direction
Valve clearance is
increased.
d. Hold the adjusting screw to prevent it from
moving and tighten the locknut to specifica-
tion.