I have the original carb...and just put the new High performance carb, EPA rated, on another build. It seems that when I go full throttle, it seems to bog down...almost like the carb is getting flooded. I've tried everything. Took is apart, checked the float, cleaned the needle, and of course....adjusted the idle pin, along with the air intake pin. Any ideas? Thanks!http://motorbicycling.com/images/smilies/Waa.gif