Check out any of the twenty-seven Front Wheel components enlisted.
The most reasonably priced component used on the Xr250r 1986 (g) Canada / Cmf Front Wheel is the Screw,oval,5x20.
Some items from this specific schematic: Washer,spdmt.gear, Axle,fr.wheel, Spoke,a9x228.5, Dust Seal,40x50x5.
