Yes they will bolt straight on as the PCD of the holes is the same BUT.........The RS is 35mm smaller in dia' and is only 4mm thick when new with a min' limit of 3.5mm. So you would have to rig up another caliper if you wanted to use one. The caliper would have to be RS125 or eqivalent to the narrow track of the rotor. Personally I think it's a lot of work for nothing. You will have a lighter rear set up but if you have to use it then the extra 136 pounds of the NSR compared to the RS125 will fry the pads.