Hm odd then. My 05 had a cat box. But did eventually install a cat bypass pipe. With a k+n filter with a dealer tune to suite. Along with a O2 sensor removal kit. Haha needless to say that bike was runnin meeean for a good bit till the gear went on me.
In any event im jus glad that another newer r3 model engine will fit n work properly.
I know the earlier yrs had some factory recalls...lol specifically the friggin second gear gettin chewed up!
