Yamaha XS650SE, Shop Manual

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Motor Corporation, U.S.A.. 1979 All rights Any reprinting or unauthorized
without the written permission of Yamaha Motor Corporation, U.S.A., is prohibited.
NEW SERVICE
*SPECIAL TOOL
New special tool for XS650G/XS650SG.
“TORX” socket
P/NO. 90890-01308-00
This socket is used to tighten the pick-up coil
securing bolts (special bolts) and to shear off
the bolt head.
*ENGINE
A. IGNITION TIMING CHECK
Ignition timing adjustment is required only
when the pick-up coil is replaced.
1. Connect the timing light to the left
cylinder spark plug lead wire.
2. Start the engine and keep the engine
speed as specified. Use a tachometer to
check the engine speed.
Specified engine speed: 1,200 r/min
3. The rotor pointer should line up with
the “F” stamped timing mark on the
timing plate. If it does not align or
steady, check the crankshaft bearing
and/or woodruff key for damage.
B. PICK-UP COIL ASSEMBLY
The pick-up plate assembly is permanently
mounted to the stator housing with special
bolts and adhesive. It is necessary to replace
the A.C.G. stator assembly with a new one if
the pick-up coil is damaged.
C. IGNITION TIMING ADJUSTMENT
If the A.C.G. stator assembly is replaced with
a new one, the following adjustment and
treatment are necessary. It is mandatory that
these procedures be followed carefully and
exactly as described. Failure to do so may be
a violation of law.
1.
2.
Install the A.C.G. stator assembly to the
crankcase.
Set the pick-up coil assembly so that the
upper bolt (special bolt) comes in the
center of the oblong hole in the upper
pick-up plate and lightly tighten the
special bolts (upper and lower).
3. Remove the breaker cover.
4. Install the dial gauge in the left cylinder
to set the timing plate.
NOTE:
Put the gauge needle through the plug hole as
normal to the piston head as possible.
Do not let the needle contact the plug hole.
5. Rotate the engine in a counterclockwise
direction until top dead center is found.
6. With the engine at top dead center,
loosen the screw on the timing plate and
align the “T” mark on the timing plate
with the rotor pointer.
Recheck the top dead center and align-
ment of the “T” mark and pointer.
When all are aligned, tighten the screw.
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