BSA CB/DB Goldstar 350cc Piston 040 72 mmJP Piston Piston Clearance 0.12mm or 45thoumiddle Gudgeon to top pin: 40 mmMiddle Gudgeon pin to first step: 33 mmGudgeon Pin 19 mmPlease look at all pictures
BSA CB/DB Goldstar 350cc Piston 060 with Piston Rings, Gudgeon Pin and Circlips 72.5 mm Piston Clearance 0.12mm or 45thoumiddle Gudgeon to top of piston: 40 mmMiddle Gudgeon pin to first step: 33 mmGudgeon Pin 19 mmsee last pict.compression 9:1 GPM - Made in Italy