Gilera 633721 Workshop Manual page 134

Engine
- Remove the central screw and the valve lifting
device mass stop bell using the special tool.
Specific tooling
020565Y Flywheel lock calliper spanner
- Remove the return spring and the valve lifting
mass with relevant travel end washer.
N.B.
BE CAREFUL NOT TO ALLOW THE WASHER AND SPRING
TO FALL INTO THE ENGINE THROUGH THE CHAIN COM-
PARTMENT.
- Align the references located on the tone wheel
and on the head.
- Loosen the central screw on the tensioner first.
- Unscrew the 2 fastening screws and remove the
tensioner with relevant gasket.
ENG - 134
Nexus 500 euro 3