BSA DBD Gold Star Piuston Pre Unit 500cc Piston +020. BSA Unit Gold Star 50085.5 mm 9.5:1 Piston Clearance 0.12mm or 45thouwith Piston Rings, Gudgeon Pin and Circlips
Norton 600cc 650cc Piston. Pair GPM +20 68,5 mm Diameter, new at 600 cc Compr. Ratio: 7.4:1 at 650 cc 8.25:1 middle gudgeon pin-top: 40 mm Gudgeon pin diameter: 17. 5 mm - 11/16"
Piston Clearance 0.12mm or 45thou 297 g weight Mod. 77 v- 1956-58 Mod. 99 1956-62 Nomad 1968 650 1960-63 Mod. 99SS 1961-62 650 SS 1961-70 including gudgeon Pin, piston rings and circlipsprice per pairPlease look at all pictures