Here are the before and after pics I took of my rotor swap. These are off of a 98+ Kat. They are 4mm just like the 89 Kat rotors so they bolt right up. Jim and Keith did this mod on Jims 89 Kat and so I did it to mine. It was minly for cosmetic reasons. They may be just a little lighter. This is also so I can show off My bike and Jim's seat cowl for the Pre 98 750 Kats...











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