Yamaha FJR1300A(X), Service Manual

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ENGINE
3-14
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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.
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.
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8. Install:
• Spark plug
9. Connect the all spark plug caps.
10.Install:
• T-bar
Refer to “GENERAL CHASSIS” on page 4-1.
• Fuel tank
Refer to “FUEL TANK” on page 7-1.
• Rider seat
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 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. 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.
CAUTION:
ECA3P6D021
• Engine oil also lubricates the clutch and the
wrong oil types or additives could cause
clutch slippage. Therefore, do not add any
chemical additives or use engine oils with a
grade of CD “c” or higher and do not use
oils labeled “ENERGY CONSERVING II”
“d”.
• Do not allow foreign materials to enter the
crankcase.
Compression pressure (with oil applied into
the cylinder)
Reading Diagnosis
Higher than without
oil Piston ring(s) wear or
damage
→
Repair.
Same as without oil
Pistons, valves, cylin-
der head gasket or
piston ring(s) possi-
bly defective
→
Re-
pair.
T
R
.
.
Spark plug
13 Nm (1.3 m·kg, 9.4 ft·lb)
Type
SAE 10W-40, SAE 10W-50, SAE
15W-40, SAE 20W-40 or SAE
20W-50
Recommended engine oil grade
API service SG type or higher,
JASO standard MA
-20 -10 0 10 20 30 40 50 ˚C
SAE 10W-30
SAE 15W-40
SAE 20W-40
SAE 20W-50
SAE 10W-40
SAE 10W-50