Vincent Piston +030 500ccWith Gudgeon Pin - DM: 7/8", Circlips and Piston Rings 9:1 Compression, Compression Hight: 32mm Piston Clearance 0.12mm or 45thou, cast Parts Suitable for Use Soleley or Principally With Spark-Ign. Int. Combustion Piston Engines domed with valve pockets JP Piston Made in Australia
compression ratio 9:1, Year: 1950-55 (std)Please look at all pictures