Checking The Engine Oil Level - Yamaha 2010 XMAX YP125R Service Manual

3. Start the engine, warm it up for several min-
utes, and then turn it off.
4. Disconnect:
• Spark plug cap
5. Remove:
• Spark plug
ECA37P1016
NOTICE
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.
6. Install:
• Compression gauge "1"
Compression gauge
90890-03081
Engine compression tester
YU-33223
7. Measure:
• Compression pressure
Out of specification → Refer to steps (c) and
(d).
Standard compression pressure
(at sea level)
1400 kPa/500 r/min (14.0
kgf/cm²/500 r/min, 199.1 psi/500
r/min)
Minimum–maximum
1120–1570 kPa (11.2–15.7
kgf/cm², 159.3–223.3 psi)
M MMM 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.
EWA37P1002
WARNING
To prevent sparking, ground the spark plug
lead before cranking the engine.
1
M MMM M M MMM M M MMM M
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.
Compression pressure (with oil applied into
the cylinder)
Reading
Higher than without
oil
Same as without oil
L LLL L LLL L
8. Install:
• Spark plug
9. Connect:
• Spark plug cap
10.Install:
• Storage box
Refer to "GENERAL CHASSIS" on page 4-1.
EAS20740

CHECKING THE ENGINE OIL LEVEL

1. Stand the vehicle on a level surface.
TIP
• Place the vehicle on the centerstand.
• Make sure the vehicle is upright.
2. Start the engine, warm it up for several min-
utes, and then turn it off.
3. Remove:
MMM
• Dipstick "1"
4. 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.
3-26
ENGINE (YP250R)
Diagnosis
Piston ring(s) wear or
damage → Repair.
Piston, valves, cylin-
der head gasket or
piston ring(s) possi-
bly defective → Re-
pair.
L LLL L L LLL L L LLL L
Spark plug
18 Nm (1.8 m·kgf, 13 ft·lbf)
L LLL L LLL