Gilera 633721 Workshop Manual page 186

Engine
- Remove the oil pump complete with the gearing
by loosening the 2 retaining screws through the
eyes machined in the gearing proper.
- Remove the gasket.
- Remove the two screws and the oil pump cover.
- Remove the inside rotor retaining snap ring turn-
ing it to move the opening at the shaft face.
ENG - 186
Nexus 500 euro 3