Again, leave it alone. for a "stock" bike, this thing FLIES. The only thing I do on these is put a Solas Concord 15/20 on them if your stock prop gets chewed up. It's a bit quicker off the line and top end, but will eat 200 RPMs wide open vs. stock.
Even for a 13 year old ski, this thing will smoke almost anything out there... in 2002 it must have been crazy.
Carbs, Jets, pipe, etc, may get you to the rev limiter a bit quicker, but you're still going to crash into it. If you can't spin it faster, you'll need a bigger prop, and etc etc etc.
I'm not saying you can't, I'm just saying, and yes from experience, that reliability trumps all else on the water.