Yamaha XS650 Series, Shop Manual

Page: 197 / 215

6. Retighten screws. Check timing again
for right cylinder.
7. Repeat procedure (steps 2 6) for left
cylinder.
1. Right cylinder timing adjustment
2. Left cylinder timing adjustment
F. Spark plug
Check electrode condition and wear, insulator
color, and electrode gap. Use a wire gauge for
adjusting the plug gap. If the electrodes
become too worn, replace it.
When installing the plug, always clean the
gasket surface, wipe off any grime that might
be present on the surface of the spark plug,
and torque the spark plug properly.
Standard spark plug:
N-7Y (CHAMPION) or BP7ES (NGK)
Spark plug gap:
0.7 0.8 mm (0.028 0.031 in)
Spark plug tightening torque:
2.0 m-kg (14.5 ft-lb)
(PAGE 29 33)
3-4. ENGINE ASSEMBLY AND ADJUSTMENT
0. Engine
Specifications should be changed as
follows:
Engine mounting bolt
torque:
Upper Nut) M8
1.8 m-kg (13.0 ft-lb)
3.0 m-kg (215
Front
Nut) Ml0 4.6 m-kg (33.5 ft-lb)
Rear
Nut) Ml0 4.1 m-kg (29.5 ft-lb)
Rear under
Nut)
M l 0 4.6 m-kg (33.5 h-lb)
Under Nut)
(65.0 ft-lb)
(PAGE 39 40)
5-1. FRONT WHEEL
C. Front wheel inspection (XS650SF only)
1. Check for cracks, bends, or warpage of
wheels. If a wheel is deformed or crack-
ed, it must be replaced.
2. Check wheel run-out
If deflection exceeds tolerance, check
wheel bearing or replace wheel as required.
Rim run-out limits (XS650SF/XS650-2F):
3. Check wheel balance
Rotate wheel lightly several times and
observe resting position.
If wheels is not statically balanced,
wheel will come to rest at the same po-
sition. install balance weight at lighter
position (at top) as illustrated.
NOTE:
The wheel should be balanced with brake disc
installed.
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