I have a 02 WR426 which has its exhaust swithched from a white bro full system to a FMF Q pipe with power bomb. had to do it for legal reasons, I think its called an MOT over here in "My Horse has right of way". No, seriously, the mid range power has increased and is more usable, but my bottom end "Punch" has gone !!!. the bike heart and lungs is completely standard apart from that. Any adviseon how to get some of the bottom end power back ie. jetting, needle position ect..... please. !!