kymco mo bw250 Instruction De Maintenance

Warm up the engine before compression test.

Remove the center cover and spark plug cap.

Remove the spark plug.

Insert a compression gauge.

Open the throttle valves fully and pushes the

starter button to test the compression.
Compression: 16.5±2kg/cm_
If the compression is low, check for the

following:
_

Leaky valves

_

Valve clearance to small

_

Leaking cylinder head gasket

_

Worn  pistons

_

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