For 2017, there is nothing earth shattering coming from Big Blue, just some minor and medium sized changes, primarily focused on the 250 four-strokes. The YZ250F and YZ250FX see a new cylinder head and intake system, transmission changes, some minor chassis changes, and suspension valving changes to match. The YZ450 only gets four minor changes: a new air box cover, new rear brake disk material, new Dunlop MX3S tires, and new graphics. The WR250 and 450 are the same as last year’s models except for black rims and the new air filter cover. The two-stroke motocross models are still available and the YZ125 and YZ250 both get 270mm front brake rotors (up from 250mm).