Kawasaki Big Bore Service
Our prices below includes cylinder sleeve installed, Top End kit and all necessary modifications ( bore, port, powervalve machined, head re-chamfer to work with larger piston)

If you need to increase displacement then increasing the bore size is the best option. You cannot go wrong with an ACAS works Big Bore kit. ours is quite reliable and the most reasonable on the market today.. 

The process is a simple as follows. 

  • Remove your jug

  • Remove the studs and all other items not needed for the Mod ( we charge extra for this removal)
  • leave the powervalve in,
  • Send the cylinder head
  • Fill out the Job Order form completely and put it in the box
  • If you do not see your cylinder model in the drop down, then write it in the notes
  • Pack your jug properly to avoid damage during shipping
2 Stroke Kawasaki Big Bore ( this will include a wiseco, Namura or Prox Top End kit)

KX65     71cc      bore  46.5mm         2000-19        $420
KX80    90cc      bore  50mm           1988-00        $420
KX85     92cc     bore  50.5 mm        2000-13         $420
KX85     99cc     bore  52.5mm         2000-13         $420
KX125    134cc    bore  56mm           1995-17          $475