INSP
ADJ
R-51
r.p.m.
B.T.D.C.
7 0.5
A
D
B
C
Std.
+
28 1.5
+
800 r.p.m
2,000 r.p.m
5,500 r.p.m
1,400 r.p.m
Auto Advance
1
2
3
4
IGNITION TIMING CHECKING PROCEDURE
3. Check :
• Ignition timing
*********************************************
Checking steps :
• Start the Engine and let it warm up for sev-
eral minutes or run the Motorcycle for approx.
4 kms.
• Maintain the Engine idling speed
• Confirm that the stationary pointer on LH
Crankcase Cover ç falls within the ignition
timing range
è
marked on Rotor Assembly.
NOTE :
Ignition timing is not adjustable.
4. Check
• Auto advance mechanism
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Checking steps
• Increase the Engine speed from 1400 r/min to
2250 r/min
• Check the stationery pointer ç should be
within the ignition timing range è marked on
the Rotor Assembly
• Further increase the Engine speed from 2250
r/min onwards.
• Observe that Rotor ignition timing mark moves
in clockwise direction gradually and later not
visible.
• If above phenomenon is not observed it con-
firms that the CDI unit is defective (Auto Ad-
vance mechanism not working)
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5. Install :
• Plug straight screw (with O-ring)
3-12
A :
Auto Advance reverse circuit not working
B :
Auto Advance not working
C :
Delay Auto Advance
D :
STD Auto Advance working
Engine idling speed :
1,300 ~ 1,500 r/min
