99 GSXR750 front end, with RC51 rotors on my '79 xs750. I machined custom triple trees to correct the offset(and trail), machined a custom axle and spacers to retain stock wheel and speedo drive, and machined rotor adaptors. did some wiring to make the GSXR handlebar controls work as well. 1/4 turn throttle is SWEET!
I'm also putting a 2005 ZX10 front end on another xs750 in a similar fashion, an early inverted zx-7r front end on a cx500, and a TL1000r front end on a cb550.
yes, I'm obsessed with resto-mod cafe racer builds.
I also helped put a suzuki boulevard front end on a cb360.