Norton Dominator Piston/Pair GPM 600/650cc +060= 69.5mm middle gudgeon pin-top: 40 mm Gudgeon pin diameter: 17. 5 mm - 11/16"
at 600 ccm: 7,4:1 compression ratio at 650 ccm 8,25:1 Mod. 77 v- 1956-58 Mod. 99 1956-62 Nomad 1968 650 1960-63 Mod. 99SS 1961-62 650 SS 1961-70 Piston Clearance 0.12mm or 45thouincluding gudgeon Pin, piston rings and circlipsPrice per pairPlease look at all pictures