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AJS/Matchless Pistons Twin 1949-59 Mod. 20. G9.Clubman +040 /Pair
+40 = 67 mm
gudgeon pin diam. 19 mm
Compr. Ratio 7,8 : 1
Piston Clearence 0.12mm or 45thou
incl. Gudgeon Pin, Piston Rings and Circlips
Price per Pair
These can be used for the later 500 cc Mod., have a little lower compression, since these are not available.