Never owned a yz450 before.this is my 1st one. Anyway this thing is pretty nice. I bought it for 1700 bucks from a friend of a friend. Starts first kick every time. But when i bought it the guy told me it was a 4 speed. I took it for a ride and sure enough only 4 gears. Still works great though. But when i looked up the specs on an 08 it says they are five speeds. Was 4 speeds an option or what? Not sure why its only got 4 gears. I hope 5th gears not broken or something. But it doesnt act like there is another gear, it just stops shifting like thats all the gears there is. Sorry for the dumb question. But can somebody help me out.