......and if you are going to reply with "do a search", than go ahead and @#$* off right now. So anyway, does the Honda CRF need to have the same, or similar mods done to make it the bike it was designed to be performance wise? If I heard correctly Yamaha governed the bike to pass sound/emission standards or something along those lines. So why are the Hondas able to pass these standards? (assuming no mods are necessary).