Velocette Venom VM/MSS Cylinder Barrel Flange about 10/11mm thick ID: 86mm Fits all 500cc from 1954 except Thruxton! Made in England by Velocette Ltd. MSS Venom Clubman 500cc MK1 and MK2 Scrambler 500cc Endurance
Piston NOS with Piston Rings, Gudgeon Pin and Circlips new, old stock Diameter: 69mm Total Height: 64.9mm Gudgeon Pin: 17.4mm Compression height: 29.2mm