Norton DominatorPiston/Pair 600/650cc GPM +20 /Pair
BOA37.+020.600/650ccNorton 600/650cc 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
Mod. 77 v- 1956-58
Mod. 99 1956-62
Nomad 1968
650 1960-63
Mod. 99SS 1961-62
650 SS 1961-70
