I am working on rebuilding a go kart I bought a few months ago. Everything was going well until the brakes. I cannot seem to find any brake rotors that will work with the axle it has. The kart has a 1 inch diameter hex axle, and the only rotors I have found with hex bore are 7/8 inch diameter. I have been searching for a while, and I do not want to spent the money to replace the axle and all of the parts to go with it. Do you have any ideas?