129" and 132" Cylinder & Piston Kits

129" & 132" Big Bore Cylinder & Piston Kits for 2017-Up M8 models

  • Huge displacement increase means huge power increase
  • Works with stock crankcases
  • Original engine serial numbers are retained
  • Powder coat finish matches factory finish, giving the bike a "sleeper" advantage
  • MLS (multi-layered steel) head gaskets
  • Retains stock engine height
  • Includes Cam Cover Badge

129" & 132" Cylinder & Piston Kits for 2017-Up M8 models

DescriptionPart #
129" Big-Bore Kit 4.375" Stroke Highlighted Cylinders910-0843
129" Big-Bore Kit 4.375" Stroke Non-Highlighted Cylinders910-0844
132" Big-Bore Kit 4.500" Stroke Highlighted Cylinders910-0845
132" Big-Bore Kit 4.500" Stroke Non-Highlighted Cylinders910-0846
129 and 132 parts
129 132 big bore dyno chart