Honda BF135A Manual page 376

4) Disconnect the oil tube from the mounting case.
5) Move the water relief tube A from your side of the
projection on the cylinder head cover to the other side.
6) Remove the six 6 mm hex. cap nuts and the six head cover
washers, then remove the cylinder head cover.
10-3
[1]
OIL TUBE
[2]
MOUNTING CASE
[2]
HEAD COVER
WASHER (6)
[1]
WATER RELIEF
TUBE A
[2]
PROJECTION
[3]
CYLINDER
HEAD
COVER
[1]
CYLINDER HEAD
COVER
[3]
6 mm HEX. CAP
NUT