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What mods can I do to my 1994 657 SeaDoo SPX for more power and speed?

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What mods can I do to my 1994 657 SeaDoo SPX for more power and speed?

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  1. Unfortunately, there's not a whole lot you can do with that size motor to gain any appreciable performance.  Modifying the head, carb, and maybe the exhaust pipe will gain a little more power, and and impeller repitch is about it.

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