I have a 2001 gti that starts, and idles perfect. It goes fine but seems low on power and won’t go faster than 30 mph and doesn’t seem to rev how it should. It has great compression, great spark and fuel, I just rebuilt the carb and didn’t make it any better. I was wondering if it’s something with the jet system, impeller or something like that, that I’m not familiar with. The problem started occurring after the ski was pulling a tube under a bit of stress. It doesn’t seem to be bogging or running poorly so I’m wondering if something with the jet system is worn.