The 89 & earlier GSXR's had skinnier tires than the Bandit, so the wheels are probably going to be too narrow. (110 fronts and 150/160 rears.)
Your second post sounds familiar. I'm 99% sure about the RF900 and that serier of GSXR11 sounds about right. Others may work, but you may need to use their sprocket carrier/cush drive and may look different. Check axle sizes and overall widths.