Checking The Engine Oil Level - Yamaha Star XVS13AA(C) 2011 Service Manual

7. Measure:
• Compression pressure
Out of specification → Refer to steps (c) and
(d).
Standard compression pressure
(at sea level)
1450 kPa/400 r/min (14.5
kgf/cm²/400 r/min, 206.2 psi/400
r/min)
Minimum–maximum
1200–1500 kPa (12.0–15.0
kgf/cm², 170.7–213.3 psi)
M MMM M MMM M M MMM M M MMM M
a. Set the main switch to "ON".
b. With the throttle wide open, crank the engine
until the reading on the compression gauge
stabilizes.
TIP
The difference in compression pressure be-
tween cylinders should not exceed 100 kPa (1
kg/cm², 14 psi).
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 min-
imum specification, pour a teaspoonful of en-
gine oil into the spark plug bore and measure
again.
Refer to the following table.
1
M MMM M M MMM M MMM
3-11
Compression pressure (with oil applied into
the cylinder)
Reading
Higher than without
oil
Same as without oil
L LLL L LLL L L LLL L L LLL L
8. Install:
• Spark plug
Spark plug
13 Nm (1.3 m·kg, 9.4 ft·lb)
9. Connect:
• Spark plug caps
10.Install:
• Rear cylinder covers
• Front cylinder covers
Refer to "ENGINE REMOVAL" on page 5-1.
EAS20750

CHECKING THE ENGINE OIL LEVEL

1. Stand the vehicle on a level surface.
TIP
• Place the vehicle on a suitable stand.
• Make sure the vehicle is upright.
2. Check:
• Engine oil level
The engine oil level should be between the
minimum level mark "a" and maximum level
mark "b".
Below the minimum level mark → Add the
recommended engine oil to the proper level.
ENGINE
Diagnosis
Piston ring(s) wear or
damage → Repair.
Piston, valves, cylin-
der head gasket or
piston possibly defec-
tive → Repair.
L LLL L L LLL L LLL
b
a