07155?
You say the 07155....? Are you talking about a 2007 wake? As for your 2005 being a bit slow. I've said this once and I'll say it again. When someone buys something fast, whether it's a new motorcycle, PWC or hotrod, it goes really fast!.....remember the first time you rode your 2005? I bet it laid your head back into the person behind you when you took off. Well, now with the couple years you've owned it, you are used to the throttle response and have the desire to try something a bit faster. Chances are, there is nothing wrong with your Doo, you just want something faster. You can get the 2007 and it'll do everything your Doo is doing now. But in a few months, you'll get use to the throttle resonse of that Doo and want a faster one.
If your Doo is truly a bit slower than it used to be, I'd check the clearance on your impellor. You may need to replace your wearing ring. And while your at it, check the condition of your impellor. It may be time to let the shop do a tune up, if you feel the engine is a little sluggish............:cheers:
Happy riding!