This is our master price list of the biggest selection of big bore kits available by any engine builder in the motorcycle industry. All of these kits include these services and parts. Use our drop down menu below to choose your vehicle.

For 2-stroke engines, the package includes:

  • Cleaning and disassembly.
  • Inspection and measurement.
  • Over-boring to big bore size 2, 3, 4 & 5mm.
  • Porting: You’ll get your choice of powerbands; more low/mid, more mid/top, broader powerband, and choices of fuel; pump or race gas.
  • Replating with nickel silicon carbide composite plating and diamond honing.
  • Head mods: resurfacing, squish and bowl machining, polishing.
  • Powervalve service with assembly and timing, ready for installation!
  • Includs complete piston kit, all kits come with gasket kits, PV seals and o-rings, top end needle bearing, and alignment pins.
  • Piston check with ring end gapping set to install.
  • Cylinder bore set-up for no break-in, just ride!
  • Backed up by a 1-year warranty on the plating and free updates to the porting and diamond honing.

For 4-stroke engines, the package includes:

  • Over-boring 2, 3, 4mm
  • Plating with diamond honing
  • Your choice of piston Wossner, Wiseco, JE, Vertex, CP
  • Piston check with ring end gapping and assembly of the ring pack
  • Backed up by a 1-year warranty on the plating and free diamond honing