IMG_2527[1].JPG
Yamaha Big Bore Service
THIS CYLINDER SERVICE IS FOR 2 STROKE !

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 and send it along

2  & 4 STROKE CYLINDERS  ( Namura piston kits available or Piston of your choice... send us a request  )
Special Sleeve (Customized)
Piston kits available