so i recently just bought from a friend a 2000 seadoo gtx.. it only has 22hrs on it and hasnt been riden since 06!!!!!!..so what all do i need to change(already did plugs) and what can i do to make it faster? which impeller is best? Can you put a exhaust or intake on it? sorry i know really nothing about jet ski performance parts besides impellers and thats only from reading on them... thanks for the help guys!!!!!!