Honda MB5 1982 Owner's Manual page 51

6. Install the filler cap. Start the engine
and let it idle for a few minutes.
7. Stop the engine and remove the
oil level check bolt (3) and check the
oil level.
If
the oil level is below the
check bolt hole, add the oil until it
spills out from the check bolt hole.
Check that there are no oil leaks.
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