3 - 18
CHK
ADJ
MEASURING THE COMPRESSION PRESSURE
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a. Set the main switch to “ON”.
b. With the throttle wide open, crank the
engine until the reading on the compression
gauge stabilizes.
WARNING
@
To prevent sparking, ground all spark plug
leads before cranking the engine.
@
NOTE:
@
The difference in compression pressure
between cylinders should not exceed 100 kPa
(1 kg/cm
2
, 1 bar).
@
c. If the compression pressure is above the
maximum specification, check the cylinder
head, valve surfaces and piston crown for
carbon deposits.
Carbon deposits
→
Eliminate.
d. If the compression pressure is below the
minimum specification, squirt a few drops of
oil into the cylinder and measure again.
Refer to the following table.
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7. Install:
• spark plug
8. Connect:
• spark plug cap
Compression pressure (at sea
level)
Minimum
1,200 kPa (12 kg/cm
2
, 12 bar)
Standard
1,400 kPa (14 kg/cm
2
, 14 bar)
Maximum
1,600 kPa (16 kg/cm
2
, 16 bar)
Compression pressure
(with oil applied into the cylinder)
Reading
Diagnosis
Higher than with-
out oil
Piston wear or
damage
→
Repair.
Same as without oil
Piston ring(s),
valves, cylinder
head gasket or pis-
ton possibly defec-
tive
→
Repair.
T
R
.
.
18 Nm (1.8 m · kg)
Summary of Contents for VMX12 2001
Page 1: ...VMX12 2001 3LRD AE1 SERVICEMANUAL ...
Page 2: ......
Page 8: ......
Page 9: ...GEN INFO 1 ...
Page 11: ...GEN INFO ...
Page 21: ......
Page 22: ...SPEC 2 ...
Page 24: ...SPEC ...
Page 52: ...2 28 SPEC OIL FLOW DIAGRAMS 1 Camshaft 2 Main gallery 3 Crankshaft 4 Oil level switch ...
Page 54: ...2 30 SPEC OIL FLOW DIAGRAMS 1 Crankshaft 2 Oil pipe 3 Oil filter ...
Page 65: ...CHK ADJ 3 ...
Page 125: ......
Page 126: ...ENG 4 ...
Page 130: ...ENG ...
Page 236: ......
Page 237: ...COOL 5 ...
Page 239: ...COOL ...
Page 258: ...CARB 6 ...
Page 260: ...CARB ...
Page 272: ......
Page 273: ...CHAS 7 ...
Page 389: ......
Page 390: ...ELEC 8 ...
Page 396: ...8 4 ELEC SWITCHES ...
Page 417: ...8 25 ELEC STARTER MOTOR 3 Install O rings 1 bolts 2 New T R 5 Nm 0 5 m kg ...
Page 445: ...TRBL SHTG 9 ...