15. IGNITION SYSTEM
15-8
PULSER COIL
INSPECTION
Disconnect the A.C. generator connector.
Measure the pulser coil resistance between
the blue/yellow and green wire terminals.
Resistance:
90cc/70cc/50cc-4-T: 100～140Ω/20°C
50cc-2T: 80～160Ω/20°C
Note: The readings in this table are taken
with a YF-3501 Tester.
REMOVAL
Refer to chapter 14 for the A.C. generator
removal.
IGNITION TIMING
INSPECTION
Remove the fan cover.
Warm up the engine and check the ignition
timing with a timing light.
When the engine is running at the ignition
timing is correct if the “F” mark aligns with
the index mark within ±2°.
Ignition Timing:
90cc: BTDC28°/4000rpm
70cc: BTDC13°/1800rpm
50cc-4T: BTDC13°/2000rpm
50cc-2T: BTDC15°/1700rpm
Advance Mark
“F” Mark
This test is performed with the stato
installed in the engine.
＊
Pulser Coil Lead
The CDI unit is not adjustable. If the
ignition timing is incorrect, inspect the
CDI unit, pulser coil and A.C. generator
and replace any faulty parts.
＊
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