Original FL 1965-1969 primary covers are hard to come by or in bad condition. Tryinf to replace a →1969 primary cover with the 1970→ part is self-evident. But the starter shafts of FL models 1965-1969 are 7mm shorter than the starter shafts of 1970 and later FL models. This kit provides a means to close this gap and consists in a longer spacer and nut. It replaces the one-part starter shaft nut 31530-65.