KYMCO Mongoose/KXR 250 User Manual

3. INSPECTION/ADJUSTMENT
3-8
Mongoose/KXR 250
IGNITION TIMING
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 right crankcase cover.
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: 15±2kg/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.
The ignition unit is not adjustable. If the
ignition timing is incorrect, check the
ignition system.
＊
Compression Gauge
Timing Hole
Timing Hole Cap
Index Mark

KYMCO Mongoose/KXR 250 Specifications

General

Brand	KYMCO
Model	Mongoose/KXR 250
Category	Offroad Vehicle
Language	English