Checking The Engine Oil Level - Yamaha YJ50RN Service Manual

MEASURING THE COMPRESSION PRESSURE/

CHECKING THE ENGINE OIL LEVEL

d. If the compression pressure is below the
minimum specification, squirt a few drops of
oil into the cylinder and measure again.
Refer to the following table.
Compression pressure
(with oil applied into the cylinder)
Reading
Higher than with-
out oil
Same as without
oil
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7. Install:
• spark plug
8. Connect:
• spark plug cap
EAS00072
CHECKING THE ENGINE OIL LEVEL
1. Stand the scooter on a level surface.
NOTE:
• Place the scooter on a suitable stand.
• Make sure the scooter is upright.
2. Check:
• oil level warning light 1
Refer to "SIGNAL SYSTEM" in chapter 7.
3 - 13
CHK
ADJ
Diagnosis
Piston wear or
damage → Repair.
Piston ring(s), cyl-
inder head gasket
or piston possibly
defective → Repair.
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20 Nm (2.0 m · kg, 14 ft · lb)