I have had my 650r for 1 year. It is uncorked but to this day it won't wheelie in 3rd gear. I have heard people say that it will do this by pretty much blipping the gas on flat road while at peak revs. Mine just runs out of guts while 1st and 2nd its no problem. Gearing is 14\48. I do weigh 240 pounds. The bike feels strong but it is noticable on the road that its slack on the top end.I have tried screwing out the what i think is the mixture screw on the carb but i goes the same and creates a flat spot down low. Maybe i should just buy an edlebrock?