I have the opposite problem, most of my tracks (Florida) I am hitting the rev limiter half way down the back straight. Plan to try a 16T counter shaft sprocket next race.
I just ordered a new frame for my "slightly damage" RC 390. Take my advice if you are going to buy a crashed street bike to make a racer out of it look at it VERY CAREFULLY and trust nobody!
Dang Matt, sorry to hear about your misfortune. I know that getting hurt is a no no when your trying to run your own business. Get well soon, also I got my backorder parts last week so keep up the good work!