i forget what company it is but there is a brake company that sells a caliper braket for 125 and this includes a list of what bearings and rotors u can use. i think they use alot of gm g-body parts with that swap. but on my car i have stock brakes and had no problem with the bearings and i have cruise 65 for a little more then a hour and have not had any problems from them. i would think if u just have the jam nut adjusted proberly and well greesed it should not be an issue. maybe think about putting new repo bearings in. u can get those from Kanter. if and when i got to do this i think thats the route im going to take. ill see if i can find out the company that sells those kits. but i do belive there may be a sleeve involved.
bryan
bryan