not really sure on the HP, i've never had it on a dyno. but mods to a banshee motor are pretty much only limited to your budget. it's insane how much $$ you can throw at it and how strong a motor you can build out of one though. they are still a very popular quad & there are endless mods for them. my built motor is pretty mild compared to some others that i've seen on the bansheehq website.

a well built and well tuned Banshee motor would probably make for a fun track ho. but like you said earlier, i'm sure some extensive suspension mods would be required to feel good on the track too. it might make for an interesting bike though.