A company called Superbike shop is going to offer some pistons for the predator. Looks like a 530cc and a 630cc kit is going to be availible. The sides of the piston are teflon coated and the top of the piston is ceramic coated. ( I have my raptor piston coated) They also shows a couple of cams and valves availible. Go check them out. The number is 812 477 1740