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Norton Piston Big Four/Big 4 +020 - 1947/54 596cc
Norton Piston Big Four/Big 4 +020 - 1947/54 596cc
Norton Piston Big Four/Big 4 +020 - 1947/54 596cc
Norton Piston Big Four/Big 4 +020 - 1947/54 596cc

Norton Piston Big Four/Big 4 +020 - 1947/54 596cc

10890.020/8217.Q200037+.020
JP Piston Norton Big 4 +.020 82.5 mm
std = 82 mm
Gudeon Pin Diameter: 7/8"

incl. gudgeon pin, circlips and piston rings

1947-54

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