KYMCO 125 MOVIE S INJECTION, Руководство пользователя, Страница: 41 / 213

3
. INSPECTION/ADJUSTMENT
3-6
IGNITION TIMING
Remove the rear right side cover. (
!
2-2)
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.
Raise the engine speed to 5,000rpm and the
index mark on the crankcase should be aligned
with the advance mark on the flywheel.
CYLINDER COMPRESSION
Warm up the engine before compression test.
Remove the met-in box and frame center
cover. (
!
2-3)
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/cm
≤
-570rpm
If the compression is low, check for the
following:
- Leaky valves
- Valve clearance to 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.
Compression Gauge
Timing Light
The CDI unit is not adjustable. If the
ignition timing is incorrect, check the
ignition system. (
!
15-6)
＊
Timing Hole Cap
Advance Mark
“F” Mark