Ignition Timing; Cylinder Compression - KYMCO PEOPLE S 125 Service Manual

3
. INSPECTION/ADJUSTMENT

IGNITION TIMING

＊
The CDI unit is not adjustable. If the igni-
tion timing is incorrect, check the ignition
system. ( 15-6)
Remove the rear right side cover.
Remove the timing hole cap.
Check the ignition timing with a timing light.
When the engine is running at idle speed, the
ignition timing is correct if the "F" mark on the
flywheel aligns with the index mark on the
crankcase.
Also use a timing light to check the advance
mark.
Raise the engine speed to 5,000rpm and the
index mark on the crankcase should be
aligned with the advance mark on the fly-
wheel.

CYLINDER COMPRESSION

Warm up the engine before compression test.
Remove the met-in box and frame center
cover. ( 2)
Remove the spark plug .
Insert a compression gauge.
Open the throttle valve fully and push the
starter button to test the compression.
Compression: 12.8kg/cm²-570rpm
If the compression is low, check for the fol-
lowing:
- Leaky valves
- Valve clearance to small
- Leaking cylinder head gasket
- Piston rings are worn out.
- Piston/cylinder is worn out.
If the compression is high, it indicates that
carbon deposits have accumulated on the
combustion chamber and the piston head.
PEOPLE S 4T
Timing Hole Cap
Timing Light
Advance Mark
"F" Mark
Compression Gauge
3-6