KYMCO LA30AA, Service Manual

Page: 44 / 213

3
. INSPECTION/ADJUSTMENT
3-7
MX’er SYSTEM
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.
CYLINDER COMPRESSION
Warm up the engine before compression test.
Remove the spark plug.
Insert a compression gauge.
Open the throttle valve fully and push the
starter button to test the compression.
Compression : 16kg/cm ²
If the compression is low, check for the
following:
- Leaky valves
- Valve clearance too small
- Leaking cylinder head gasket
- Worn piston rings
- Worn piston/cylinder
If the compression is high, it indicates that
carbon deposits have accumulated on the
combustion chamber and the piston head.
ENGINE OIL
OIL LEVEL
Compression Gauge
Timing Light
Timing Hole Cap
•
Place the motorcycle upright on level
ground for engine oil level check.
•
Run the engine for 2 3 minutes and check
the oil level after the engine is stopped for
2 3 minutes.
*