> does anyone know what these numbers mean on top of the piston, of a puch moped. > 38 5 1019 > bing 1/12/310 #12 > 3/8 > thanks for the help > tony 38 is the diameter in mm. I think 5 will be the size of the rings. 1019 the height probably. Bing is the carb brand. It seems weird but apparently they put the type of carb that's used originaly on the piston. Hope this helps a bit. Robbert
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