Ok i have a 2007 crf250r and i got a fmf factory 4.1 with a megabomb header and i just put in a high compression piston and did a little polish and porting and i also have a boysen quickshot on my carb well i still got that bog right at the crack of the throttle and like if i roll the throttle on its fine but when i just snap it to be aggressive on the track it either almost dies or does die!Im in desperate need of some jetting help!thanks guys:worthy: