2006 SeaDoo Wake. Runs rough when revved and won't top 30mph.

[MTHancock]

Starts fine and runs great at low speeds. When I get it up to 20mph or so it sounds rough and will only go to 30mph.
My gauges are shot, so I don't know RPMs.
I've already changed plugs, disconnected/reconnected battery, and added fuel treatment and fresh gas to top it off.
It's not the (learning) key, as I have two keys and both behave the same. Thanks!



Thanks!