So I bought an SXV550 and have only run it at NJMP so far. Since NHMS is a slighty smaller track I may switch back from my 16/43 set up to the stock 16/46 set up. Are there any SXV550 owners here who ran at NHMS and what gearing did you prefer or try? I am bringning both sprockets and will most likely try the 16/43 first. If the bike doesn't top out on the straight then switch to the 16/46 but I was just curious ahead of time.