How do you make a Yamaha WR 450 F street legal?

Answer 1

have a "C" or "3" in the 8th diget of your serial number and your home free if not good luck.

It depends which state you live in because each state has its own laws. all require head light, tail light, brake light and mirror. Some states require 2 mirrors, turn signals and horn. Emissions is another big one. again, depends on which state you live in. California is notorious for near impossible emissions passing with "un" typical motorized vehicles on the street. Hope this helps.