Cylinder Compression - KYMCO People Service Manual

3. INSPECTION/ADJUSTMENT

CYLINDER COMPRESSION

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: 15r2kg/cm²
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.
FUEL TANK CAP CABLE WIRE
Please remove the front cover to inspect the
fuel tank cap cable wire slack when operate
the fuel tank cap hardly.
SEAT CABLE WIRE
Please remove the front cover to inspect the
seat cable wire when operate the seat hardly.
3-7
PEOPLE/PEOPLE S 250
Compression Gauge
Look Nut
Adjust Nut
Look Nut
Relax
Pull
Relax
Adjust Nut
Pull