The only problem I had is the recess for mountings bolts were to small. Chucked the bolts in a drill press and used a file to reduce the head diameter. Rotors are on the bike and I'm still breaking them in with the new pads I bought from D2Moto. Both of my Lakotas have the rear disc from D2Moto and they have held up well. Will buy another set of front discs if these work.