Yamaha Scorpio - Engine Oil Level Inspection

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INSP
ADJ
COMPRESSION PRESSURE MEASUREMENT/
ENGINE OIL LEVEL INSPECTION
5.Measure:
●
Compression pressure
If it exceeds the maximum pressure allowed
→
Inspect the cylinder head, valve surfaces
and piston crown for carbon deposits.
If it is below the minimum pressure
→
Squirt
a few drops of oil into the affected cylinder
and measure again.
Follow the table below.
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Measurement steps:
●
Crank the engine with the throttle wide-open
until the reading on the compression gauge
stabilizes.
WARNING
Before cranking the engine, ground all
spark plug leads to prevent sparking.
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Compression pressure
(With oil applied into cylinder)
Reading Diagnosis
Higher than
without oil
Worn or damaged pistons
Same as
without oil
Possible defective ring(s),
valves, cylinder head gas-
ket or piston
→
Repair.
Compression pressure (at sea
level):
Standard:
1,200 kPa (12.0 Kg/cm
2
, 12.0 bar)
Minimum:
1,050 kPa (10.5 Kg/cm
2
, 10.5 bar)
ENGINE OIL LEVEL INSPECTION
1.Stand the motorcycle on a level surface.
N
OTE:
Place the motorcycle on a suitable stand.
2.Start the engine, warm it up for several min-
utes, and then turn it off.