does anyone now bout the 07 yam having fuel injection . i got a picture of transworld with a 450 racee bike (akira naritas) with fuel injection but am unsure if they will bring it out so early in the market. oh yeh and by the way im 75 kgs and 16yrs old and i own a crf250r should i upgrade to a yz450 or would i kill myself? im not sure? cos they look really good and its always AWESOME to hav that EXPLOSIVE! power. also do u think i would have less maintenance cos i wont be revvving it as hard to get power so my engine should last a bit longer in the season. so yeh i really want a 450 so let me hear wat u guys think.