Complete Clutch Assembly - 4 Spring Non Cush drive type, 5 friction plates, 6 plain plates With Steel Pressure Plate Suitable for BSA A7/A10/Rocket Goldstar/DBD Goldstar/B31/B33 All Swinging Arm 1954-63 and also BSA M20/M21/M33 Rigid & Plunger Models 1937-58 The 4 spring clutch was an improved upgrade from circa 1960 and it is a popular modification made to early models. It is popular to convert from 6 spring clutch to this set up, this kit includes the following which you need to do this: 42-3236 Tab Washer 42-3237 Flat Washer 42-3267 Nut 42-3274 Pushrod NOT INCLUDED Supplied assembled, Parts made in England