• kawasaki 400 piston kit
  • kawasaki 400 piston kit

Kawasaki Ninja EX400cc Drop in High Compression Kit 2018/2019


Utilizing State of the Art CNC machines for manufacturing

Piston Info


Spears Racing has been designing and making race pistons for decades,their continuous committed to excellence to advance as the industry changes. This commitment has resulted in more forgings specific to certain applications, proprietary treated wrist pins and piston rings manufactured only for us. Each of these aspects has been put through stringent research and development stages to ensure that our product will exceed your standards.This is the kawasaki 400 piston kit.

Kawasaki 400 piston kit by Spears Racing has a new 2 Ring FSR Slipper Skirt forging Piston. This drop in high compression kit includes pistons, rings, lighter wrist pins, cir clips . The compression is 12.7 to 1. This design is lighter than OEM and comes with 1mm o/s valve pockets and deeper pockets to allow the Spears Racing Camshafts to fit with this new design.

At the forefront of performance, piston manufacturing has been a result of continuous research and development of unique materials, piston designs and technologies. Utilizing State of the Art CNC machines for manufacturing, along with purpose-designed forgings, while being able to maintain exacting specifications on each and every piston – holding tolerances to millionths of an inch.This Kawasaki 400 piston kit will add more torque and RWHP.

Several of these kits have been sold to racers and teams all around the world, teams in the Philippines have been racing with these for several months and love the difference in the off the corner torque and the new top RWHP.

The kit consist of the following:

(2) Spears Racing Pistons

(2) Lightened Wrist Pins

(2) Sets of CP/Carrillo Piston ring kits

(4) Piston Wrist pin cir clips

The box will have the necessary information on piston ring gap and will have a couple of the Spears Racing Decals

Weight 2.0 lbs

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