Oh, gotta thank Chris (hope I got the name right) as well. He helped a friend tune his motor and I asked him to check mine out while he was there. He made a small adjustment to the top and bottom end and told me to try it out. It had a slight bog on the bottom afterward so he advised me to fatten it a smidge on the bottom. Worked well, I ended up going about an hour leaner on the top and was set pretty well for the races.