Measuring The Compression Pressure - Yamaha T135SE Service Manual

CHECKING THE SPARK PLUG/

MEASURING THE COMPRESSION PRESSURE

8. Install:
9 spark plug
NOTE:
Before installing the spark plug, clean the spark
plug and gasket surface.
9. Connect:
9 spark plug cap
10. Install:
9 AIS resonator
9 center panel (lower)
Refer to "INSTALLING THE CENTER PAN-
ELS".
EAS00067
MEASURING THE COMPRESSION
PRESSURE
NOTE:
Insufficient compression pressure will result in a
loss of performance.
1. Remove:
9 side cowling (right)
Refer to "REMOVING THE SIDE COWL-
ING".
2. Measure:
9 valve clearance
Out of specification → Adjust
Refer to "ADJUSTING THE VALVE CLEAR-
ANCE".
3. Start the engine, warm it up for several min-
utes, and then turn it off.
4. Disconnect:
9 spark plug cap
5. Remove:
9 spark plug
cC
Before removing the spark plug, use com-
pressed air to blow away any dirt accumulat-
ed in the spark plug well to prevent it from
falling into the cylinder.
3-15
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CHK
ADJ
13 Nm (1.3 m•kg, 9.5 ft•lb)