Spears high compression pistons for Ninja 300 stock bore. Pistons only. $200 ‘New’ clutch for 300, used one day only. Not positive of the brand, maybe Barnett or Vesrah, whichever brand Spears sells. $80 Spears 300 heavy detent shift spring to eliminate missed shifts. $25 Will throw in the homemade clutch basket holder tool if you buy the clutch.