ENGINE
3-12
b. With the throttle wide open, crank the engine
until the reading on the compression gauge
stabilizes.
WARNING
EWA12940
To prevent sparking, ground all spark plug
leads before cranking the engine.
NOTE:
The difference in compression pressure be-
tween cylinders should not exceed 100 kPa (1
kg/cm
2
, 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.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
8. Install:
● Spark plug
9. Connect:
● Spark plug cap
10.Install:
● Inner fender
● Footrest board (left and right)
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. Wait two minutes until the oil settles, and then
check the oil level through the check window
located at the bottom-left side of the crank-
case.
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.
CAUTION:
ECA15B1035
● 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 CONSERV-
ING II”“b”.
● 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
Piston, valves, cylin-
der head gasket or
piston possibly defec-
tive →→
→→
Repair.
Spark plug
13 Nm (1.3 m•kg, 9.4 ft•lb)
T
R
.
.
Type
SAE10W30 or SAE10W40
Recommended engine oil grade
API service SG type or higher,
JASO standard MA
b
a
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