yfz because of the twin cam design
yfz450
yfz is fater because has shooter gear through 1-4 but when you hit5 it is longer
a stock yfz450 goes about 75 mph
yfz450 nerf bars fit banshee
The top Speed of a Stock YFZ450 can be 92-93mph but if modified it can go up to 115 mph The top Speed of a Stock YFZ450x can be 95-97mph but if modified it can go up to 117 mph. The YZF450x is faster because it is lighter
yfz450 is a Yamaha sport 4 wheeler 450cc engine a very powerful machine
Stock straight off the line would prolly go 60-70 mph but if tuned it can go faster easily.
every where
no
i have an 05 yfz450 and it goes about 85. with a pipe and jet kit they go about 75 stock
38.6