Split Cotter Valve Keeper.

Fit’s the following BSA and Triumph Motorcycles:

1962-1972 - BSA Unit Twins.
1967-1976 - BSA Unit Singles C25, B25, T25.
1971-1973 - BSA 500cc Unit Singles B50.
1967-1973 - Triumph TR25W, T25.

BSA and Triumph OEM Part Numbers are 68-0158 and 70-8117.

Note: Sold as a single keeper. Two are required per valve.