you can ride it but only on a track not at on government land.
same with the dirt bikes, check this a 450 dirtbike red sticker but the 450 quad green stupid ass shit we deal with in comi california and all other 2 strokes are red and i belive all dirtbikes are aswell, but if you buy a wr450 you can register it for the street and ride it all year, but they stopped that also in 03 0r 04 i think