I have a plated 08 wr450 that I'm setting up with 17" wheels motomaster 320mm rotor and calipers. When I mount on the bike it seems the calipers are not centered and are rubbing the disc. The wheels and brakes I've had for years from my yz426. How do I get them to fit my wr450???. Seems like they are about 3mm too far in? I have the stock speedo with the gears out to space the wheels, is this the problem? What is the width of the correct wheel spacer?