im looking for some input on new cams and cdi for o 06 yz450. just got bike comming from a 04 it dosent seem to run as strong. i weigh 290lbs and am looking for a little bit more umph! just wondering what i can do for a few hundred dollars besides piston. just want to know if cdi's aftermarket of off oler years make a differecne. any input would be greatly appreciated thanks.