AJS/Matchless Mod. 18. G80. G5. G90 Piston +080 = 84,55 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
Carburettor used 10TT 25clamp fitting size: 35mmthrottle slide to body - good conditionfitted with a sleevefor restoration - no warrantyPlease look at all pictures