[Bibio]

clutch slip can only happen with 5 things

1, the lifter mech push rod has no play. Adjust lifter mech or replace
2, seized or partial seized clutch cable. replace clutch cable
3, the wrong type of oil. too many friction modifiers (modern car oil)
4, worn/broken clutch plates or springs. this is rare but it does happen
5, notched clutch basket. this again is rare and more common on curvys