You can re-jet the carbs if you want. If you do, let me know and ill tell you the specs. First remove the D-plate and get the chip. 13/19 solas impeller or 14/20 for re-jeted motor. Rave valves wont increase power, they are just good for rough water so the engine doesnt hit the limiter and slow you down. If you are using mainly in calm water its a waste of money. Seal the pump shoe like motoace said, its cheap and gives hole shot gains. Worx scoop grate because it just as good as the riva and cheaper. Set the sponsons up for how your riding (circuit drop down or top speed leave up). A Worx or riva or r&d ride plate will give you 2mph and a riva nozzle will improve spee. Bleed off some water from the water jacket will give you a bit too.