First and foremost, glad to see you made it out relatively ok. It's situations like yours where I try to explain to people the importance of a helmet and gear. You never know when or what could happen, and it's best to dress for those "what ifs" that could always happen. If you didn't have on a helmet those four times your head hit the ground.....
Katanas are built like tanks. Your bike will be back and running in no time, I'm sure. I have a friend with a Katana that he has crashed quite a few times and it is still running. It looks like a streetfighter now, but still running.
