Buying a bike after bankruptcy. How much will the bankruptcy affect my monthly payments and insurance?

I want to buy a 2008 Suzuki Burgman 400cc scooter, (can't use a motorcycle, leg problems). The bike costs about $6k. My credit score is 640 right now, which isn't half bad. But on the other hand, I filed for chapter 7 bankruptcy in april 2009, which will probably affect my interest rate. I got a low balance credit card 6 months ago to help me rebuild my credit and credit score. Seems to be working (old score used to be 560).

Money is a bit tight though right now because I'm also trying to get myself a college degree. Did the idiot thing and dropped out years ago. I'm paying cash right now, but once I get my gpa back up to par, I can get financial help from fafsa. When that happens, I'll need a vehicle. I do distance education at the moment, but some of the courses will unfortunately be on-campus. Also I've heard that even with D.E., some instructors still like you to come in for labs, lectures, etc once in a while. So I need something more reliable than having to borrow a vehicle off my friends and family. I think I can afford a cheap vehicle if I plan it just right. But I need to factor in the monthly payments and insurance costs first to decide whether I can really afford it.

On rough average, How much do you think the bike payments and insurance payments would run me per month