Brand New Triumph & BSA Unit Singles Gearbox High Gear Ball Bearing. Made by "Nachi" and comes with the Correct "C3" Fit! Measures 30MM X 62MM X 16MM. Fits all BSA Unit Singles (C15, SS80, SS90, B40, Starfire, B44, Victor, B50MX, B25SS, Barracuda, Etc) from 1959-1973. Fits all Triumph late Unit Singles (TR25W Trophy, Trail Blazer, T25T, Blazer, TR5MX & T25SS) from 1968-1973 only. Also fits Triumph 350 and 500 unit twins up to 1974. Please refer to your parts catalog for proper fitment.
*****Please check your parts book to ensure the best fitment!*****
•O.E.M Part number is 29-3857, 70-8014, 57-0680, T680, 57-680, 57-0665, T665, T0665 or E8014