Hey Chaz. I'm still shaping the down pipe for the exhaust, I am going to bring back over to the left side. and I will wait to dial in carb until I'm running 100:1 opti-2, then see about jet. from going through the mega thread, the only direct negative was the guy who had a dax motor that failed(gtr50 or something not ht). if I remember correctly he first blamed opti, then said it was engine failure, then came back later saying he blamed opti again. and didn't like it at 32:1 either. as opposed to, like you said many respectable riders and many other lesser known members love it. so I'm down.