Checking The Engine Oil Level - Yamaha YZFR6V Service Manual

• Radiator
Refer to "RADIATOR" on page 6-1.
4. Remove:
• Ignition coils
• Spark plugs
ECA13340
CAUTION:
Before removing the spark plugs, use com-
pressed air to blow away any dirt accumulat-
ed in the spark plug wells to prevent it from
falling into the cylinders.
5. Install:
• Compression gauge "1"
• Extension "2"
Compression gauge
90890-03081
Engine compression tester
YU-33223
Extension
90890-04136
6. Measure:
• Compression pressure
Out of specification → Refer to steps (c) and
(d).
Standard compression pressure
(at sea level)
1550 kPa/400 r/min (220.5
psi/400 r/min) (15.5 kgf/cm²/400
r/min)
Minimum–maximum
1300–1600 kPa (184.9–227.6 psi)
(13.0–16.0 kgf/cm²)
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.
EWA12940
WARNING
To prevent sparking, ground all spark plug
leads before cranking the engine.
2
1
M MMM M M MMM M MMM
3-10
NOTE:
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.
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
7. Install:
• Spark plugs
• Ignition coils
Spark plug
13 Nm (1.3 m·kg, 9.4 ft·lb)
8. Install:
• Radiator
Refer to "RADIATOR" on page 6-1.
• Bottom cowlings
• Side cowlings
Refer to "GENERAL CHASSIS" on page 4-1.
EAS20730

CHECKING THE ENGINE OIL LEVEL

1. Stand the vehicle on a level surface.
NOTE:
• Place the vehicle on a suitable stand.
• Make sure the vehicle is upright.
2. Start the engine, warm it up for several min-
utes, and then turn it off.
3. Remove:
• Dipstick "1"
ENGINE
Diagnosis
Piston ring(s) wear or
damage → Repair.
Pistons, valves, cylin-
der head gasket or
piston ring(s) possi-
bly defective → Re-
pair.
L LLL L L LLL L LLL