3. INSPECTION/ADJUSTMENT DOWNTOWN 125i
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 valve fully and push the
starter button to test the compression.
Compression:
Downtown125i:15 kg/cm
If the compression is low, check for the
following:
Leaky valves
Valve clearance too 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.
DRIVE BELT
Remove the left crankcase cover.
Inspect the drive belt
for cracks or excessive wear.
Replace the drive belt with a new
one if necessary and in accordance
with the Maintenance Schedule.
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