AJS/Matchless Mod. 18. G80. G5. G90 Piston +020 = 83,05 mm Iron Head 1938-1946G80C 498 ccOHV 1 cyl. G5 G90Gudgeon pin diameter 7/8"Compression Ratio 7.2:1including gudgeon Pin, piston rings and circlipsPiston Clearance 0.12mm or 45thouPlease look at all pictures
AJS/Matchless Mod. 18. G80. G5. G90 Piston +040 = 83,55 mm Iron Head 1938-1946G80C 498 ccOHV 1 cyl. G5 G90Gudgeon pin diameter 7/8"Compression Ratio 7.2:1including gudgeon Pin, piston rings and circlipsPiston Clearance 0.12mm or 45thouPlease look at all pictures
AJS/Matchless Mod. 18. G80. G5. G90 Piston +060 = 84,05 mm Iron Head 1938-1946G80C 498 ccOHV 1 cyl. G5 G90Gudgeon pin diameter 7/8"Compression Ratio 7.2:1including gudgeon Pin, piston rings and circlipsPiston Clearance 0.12mm or 45thouPlease look at all pictures