I have a 2000 yamaha GP 800. I want it to take off faster and i want overall speed faster. I am looking into buying two new piston kits with all gaskets and was wondering if this will help out. Also, what is the function of reed valves? I know nothing about them. My buddy drives a 1996 Sea Doo XP and he takes me at the start everytime and then his overall speed is a couple mile an hour more then mine. Any advice or input would be greatly appreciated.