Gilera 633721 Workshop Manual page 92

Engine
Soap-based lithium grease containing NLGI 2 Molybdenum disulphide; ISO-L-XBCHB2, DIN KF2K-20
Inspecting the clutch spring
- Measure the length of the spring, while it is re-
laxed.
Characteristic
Standard length:
125.5 mm
Admissible limit after use:
120 mm
- Check the thickness of the clutch mass friction material.
Characteristic
Minimum thickness permitted:
1 mm
- The masses must exhibit no traces of lubricants;
in that case, check the driven pulley unit seals.
N.B.
UPON RUNNING-IN, THE MASSES MUST EXHIBIT A CENTRAL CONTACT SURFACE AND MUST
NOT BE DIFFERENT FROM ONE ANOTHER. VARIOUS CONDITIONS CAN CAUSE THE CLUTCH
TO TEAR.
- Do not open the masses using tools to prevent a variation in the return spring load.
ENG - 92
Nexus 500 euro 3