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Norton Piston Big Four/Big 4 +030 - 1947/54 596cc
Norton Piston Big Four/Big 4 +030 - 1947/54 596cc
Norton Piston Big Four/Big 4 +030 - 1947/54 596cc
Norton Piston Big Four/Big 4 +030 - 1947/54 596cc

Norton Piston Big Four/Big 4 +030 - 1947/54 596cc

10890.030/8217.Q200037+.030
JP Piston Norton Big 4 +.030
Gudgeon Pin Diameter: 7/8"

S.V
Big 4 No. 1
STD = 82 mm

incl. gudgeon pin, circlips and piston rings

Piston Clearance 0.12mm or 45thou

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