It's the wrong way up. Honda have not, to my knowledge, made an upside down rear Swing-Arm on a road bike. I think one of the Yamaha R1s did though. (In fact it's the R1 with underseat exhausts, around 2012.) However, realistically, might as well put this project on the back burner until I know more about any new sensibly priced V4 SuperBike from Honda. Of more pressing concern would be RC46 engine in RC24 frame and RC24 engine in RC36 frame.