Apply grease to the oil seal lips.
Apply oil to the outer circumference of the oil seal so that it will go into place smoothly.
Install the oil seal to the crankcase so that the surface of the oil seal is flush with the surface of the crankcase.

Transmission Shaft Removal
Refer to the Transmission Assy Disassembly.
Transmission Shaft Installation
Refer to the Transmission Assy Assembly.
Transmission Assy Assembly
Transmission Shaft DisassemblyDrive Chain Lubrication Condition Inspection
If a special lubricant is not available, a heavy oil such as
SAE 90 is preferred to a lighter oil because it will stay on
the chain longer and provide better lubrication.
If the chain appears especially dirty, clean it before lubrication.
NOTICE
The O-rings between the side plates seal ...
Exhaust Butterfly Valve Cable Installation
Confirm whether pulley [A] is an angle shown in the figure.
41.7° ±7° [B]
This position is original position of the pulley.
NOTE
Correct the position electrically after confirming the use
is discontinued and there is no damage when differing
from the angle of shown in the figure.
...
Oil Level Inspection
If the oil has just been changed, start
the engine and run it for severalminutes
at idle speed. This fills the oil
filter with oil. Stop the engine, then
wait several minutes until the oil settles.
NOTICE
Racing the engine before the oil
reaches every part can cause engine
seizure.
...