Norton twin valve springs, set of 8 ( 4 inner + 4 outer). Suits 500, 600, pre 1962. These are the longer springs. Large spring:- Len: 56mm; OD: 32mm; ID 25mm, Small spring:- Len: 45mm; OD: 24mm; ID: 19mm. Original part number: 067070; 06-7070 - valve spring set 22839; 06-7822; 067822 - valve spring inner 22838; 06-7823; 067823 - valve spring outer
