I am totally new to quads and just noticed in the mags that Ive been reading it seems like they only race 450's and that there are more aftermarket parts made for the YFZ450 than the Raptor 350. Do they only race the 450's? I also noticed that there is no Raptor 350 or Raptor 700 Headings in here. Are they not 4-strokes also? Anyways gimme the pros and cons about the two quads. Im leaning on getting the Raptor 350 right now, only since its not too big and can fit in my truck ( i have a toyota tacoma). But if you guys who know more about these quads than I do can give me any reason besides that the 450 has more horses and stuff, Id really like to know. I dont even know much about the racing part of these machines, what classes there are, what types of races they do, cross-country, track, trails, stuff like that. Anyways every little bit helps, Thanks everyone!!