CHK
ADJ
3-14
MEASURING THE COMPRESSION PRESSURE
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Set the main switch to “ON”.
b. With the throttle wide open, crank the
engine until the reading on the compression
gauge stabilizes.
w
To prevent sparking, ground the spark plug
lead before cranking the engine.
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, pour a teaspoonful
of engine oil into the spark plug bore and
measure again.
Refer to the following table.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
7. Install:
9
spark plug
8. Connect:
9
spark plug cap
9. Install:
9
front cowling (right)
Refer to “INSTALLING THE FRONT COWL-
INGS”.
Compression pressure
(with oil applied into the cylinder)
Reading
Diagnosis
Piston ring(s) wear
Higher than with-
or damage
→
→
out oil
Repair.
Piston, valves, cyl-
Same as without
inder head gasket
oil
or piston possibly
defective
→
→
Repair.
12.5 Nm (1.25 m•kg, 9.0 ft•lb)
3S3-F8197-E0_3 05.11.1 19:58 Page 14
Summary of Contents for Sirius T110LSE
Page 1: ...T110LE T110LSE SERVICE MANUAL 3S3 F8197 E0 ...
Page 2: ......
Page 6: ......
Page 8: ......
Page 10: ......
Page 12: ...GEN INFO ...
Page 22: ...SPEC ...
Page 99: ...ENG ...
Page 179: ...ENG 4 80 ...
Page 181: ...CARB ...
Page 261: ...ELEC ...
Page 265: ...ELEC CHECKING SWITCH CONTINUITY 7 4 ...
Page 301: ...TRBL SHTG ...
Page 303: ...TRBL SHTG TROUBLESHOOTING 8 2 COMPRESSION SYSTEM ...
Page 305: ...TRBL SHTG ...
Page 306: ......
Page 307: ...YAMAHA MOTOR CO LTD 2500 SHINGAI IWATA SHIZUOKA JAPAN ...