Heres a little help with mounting any seat you want. (Mine is a 5 star tank on a magnum frame)
1. As you can see in the picture you just measure to original mount holes on the bars (which are 1/4" aluminum, very easy to drill)
2. drill holes, mount bars
3. put gas tank in place, then line up ware you want to mount the seat on the bars
4. mark with a sharpie, make sure there square, drill holes
5. Mount Seat!
Hope this helps!