These clutch plates fit pre unit and unit Triumph and BSA motorcycles, 500 / 650 / 750 c.c. This is a full set of fiber plates, you also need a set of six steel plates to complete your clutch. A good set of clutch plates is really important to transfer the power your engine is creating efficiently to the rear wheel. Good quality clutch plates save a lot of hassle and keep your knees in the breeze! Fits Triumph 650 and 750 c.c. unit twins (T120 and T140 Bonneville, TR6 and TR7 Tiger among others) from 1963-1982, Triumph 350 and 500 unit twins 1957-1974, BSA A50 and A65 unit twins 1966-1972 that have a 3-spring style clutch, and BSA A7 and A10 with a 4-spring clutch from 1960-1963. OEM 57-4763, 57-1362, 42-3192 or 68-3267