OK, just for clarity, Condor and Dingy referred to forks and master cyl from 86-93 and then mentioned 2nd gen rotors and quad calipers. Are you saying rotors and calipers from the 99 version bikes? or are we still talking 86-93 for all upgrade parts for my 83. I see this sites history section shows 298mm rotors for the 99 vintage which are the same diameter as the rotors on my 83. With that rotor dia, I am about a half hole away from the bolt holes on the r6(blue star) caliper and 89 forks from lining up, while the caliper is bottomed on the rotor. (No problem bolting to the fork w/o the rotor). So I hope you are referring to rotors off the 86-93s.