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PERIODIC MAINTENANCE
1
2
3
4
5
6
7
8
9
10
5.
Measure:
• Compression pressure
Crank the engine until the needle stop rising on the
compression gauge.
Out of specification Refer to the testing steps.
Standard compression pressure:
800–950 kPa
(8.0–9.5 kg/cm², 116–137.75 psi)
WARNING
To prevent sparking when cranking the engine,
ground the high tension cord.
Testing steps (below the minimum specification):
a. Squirt a few drops of oil into the cylinder.
b. Measure the compression again.
Reading
Higher than
• Worn cylinder, piston, and piston ring(s)
without oil
• Defective piston, piston ring(s), valve(s), and
Same as
cylinder head gasket
without oil
• Improper valve timing and valve clearance
Testing step (above the maximum specification):
a. Check the cylinder head, valve surfaces, and pis-
ton crown for carbon deposits.
Carbon deposits Eliminate.
6.
Install:
• Spark plug
Spark plug:
20 N·m (2.0 kgf·m, 15 lb·ft)
• Spark plug cap
7.
Install:
• Rear cover 1
(Refer to "COVERS AND FUEL TANK" on page
2-3)
2-24
Diagnosis
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