Did the 3x3 airbox mod, stock jets 142.5, 22.5, opened up stock pipe. fuel screw 3.5 turns out, and installed the Dynojet needle-had to use the stock (big) spring...the one that came with the kit would'nt fit. It was alot skinnier that the stock and kept folding over when I tried to replace the cap on the carb. I did install the small DJ spring though. Anyway, when the bike is at low RPMs it hesitates when I gas it.ie If i'm going 45 mph in 5th gear and snap open the throttle the motor almost cuts out for a second then it kicks in and I get the power. Also, maybe I'm being greedy but it doesn't feel as fast as I thought it would. Did I do something wrong???