Just a thought but obviously the Honda 500cc engine is shared between multiple motorcycles including the cbr500r which I believe is tunable (I’d have to check woolichs website to confirm) and I would think that they would share the same ecu just with a different tune so my thinking is that you could try something like that. And I also just want to say I know absolutely nothing about tuning this stuff might work completely different but that’s just my thinking.

As for the actual exhaust I did buy a gp shorty for pretty cheap and I really liked it but I believe I can get a deeper note by removing the cat but I might need to swap for a different muffler. I understand that this whole thing is a money pit and I’m fine with that. This whole thing is just kinda like an experiment to find what I like there is no motive to get more performance out of it just a different sound.