The OEM's do make available a very small pool of bikes and ATV's for fitment and prototyping to most of the major aftermarket companies..Sometimes not enough to go around...as others have said, they "might" get one day with the bike to make something fit. Also, a 2010 Yami 450 has been spotted at one of these very companies...and it's a pretty dramatic revision from the 2009 model !
This ain't right! A 2010 yz450 has been seen in real life? More details. someone has to get a picture of this thing. I am having a hard time with the concept of waiting till September to see this thing.