BSA Piston B33/M33 1954-60 std. Made in Italy STD=85 mm middle gudgeon pin to Crown 48 mm Gudgeon Pin 19mm Piston Clearance 0.12mm or 45thou for short rod Compression Ratio: 7.25:1 65-1613 ConrodCmp Hight 43mm+5mm domewith Piston Rings, Circlips and Gudgeon Pin
middle gudgeon pin to Crown 48 mm Gudgeon Pin Diam. 19 mm Piston Clearance 0.12mm or 45thou for short conrod Compression Ratio 7.25:1 65-1613 Conrodwith Piston Rings, Circlips and Gudgeon PinGandini
BSA Piston B33/M33 1954-60 +060= 86.5 mm Made in Italy middle gudgeon pin to Crown 48 mm Piston Clearance 0.12mm or 45thou for short conrod Compression Ratio: 7.5:1 65-1613 Conrod3/4 pinwith piston rings, circlips and gudgeon pin