Measuring The Compression Pressure - Yamaha 5KM2-AE1 Service Manual

CHECKING THE IGNITION TIMING/

MEASURING THE COMPRESSION PRESSURE

4.Detach:
Timing light
G
Tachometer
G
5.Install:
Engine side cover
G
Fuel tank side panel (left)
G
Seat
G
Refer to "SEAT, CARRIERS, FENDERS
AND FUEL TANK".
MEASURING THE COMPRESSION
PRESSURE
NOTE:
Insufficient compression pressure will result in
a loss of performance.
1.Check:
Valve clearance
G
Out of specification → Adjust.
Refer to "ADJUSTING THE VALVE CLEAR-
ANCE".
2.Start the engine and let it warm up for sev-
eral minutes.
3.Stop the engine.
4.Remove:
Spark plug
G
5.Attach:
Adapter
G
Compression gauge 1
G
Compression gauge:
P/N. YU-33223, 90890-03081
Adapter:
P/N. YU-33223-3, 90890-04082
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ADJ