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3. LUBRICATION SYSTEM VITALITY 50
IGNITION APPARATUS
Spark Plug
Gap, Wear and
Remove the frame center cover. Fouling Deposits 0.6-0.7mm
Remove the spark plug cap and spark plug.
Check the spark plug for wear, fouling and
carbon deposits. Washer Damage
Remove the fouling and carbon deposits
with a spark plug cleaner or wire brush.
Specified:
Cracks
2-Stroke: NGK-BR8HSA
4-Stroke: NGK-C7HSA
Spark Plug Gap: 0.60.7mm
Ignition Apparatus Index Mark
The CDI ignition timing is not adjust-
able. If the timing is incorrect, check the
CDI unit, ignition coil and A.C.
generator and replace any faulty parts.
Remove the A.C. generator fan cover.
( 8-3)
Remove the four bolts from the fan and
then remove the fan. ( 8-3)
Warm up the engine and check the ignition
timing with a timing light. F Mark
When the engine is running at the specified
rpm, the ignition timing is correct if the "F"
mark on the flywheel aligns with the index
mark on the crankcase within 2°.
Ignition Timing:
2-stroke: 13.5°2°/3000rpm
4-stroke: 28°2°/4000rpm
3-15