State Farm. They don't care if it's a sportbike or a harley. They charge by the cc. I've got full coverage on my 2013 for $400some per year.
I was cautioned by my current agent about State Farm's policy. When you call for a quote as you're saying, they don't care what type of motorcycle only displacement. They will even sign you up for a policy. However, State Farm does have a list of bikes they exclude too that often results in cancelled policies post facto. If the agent providing the quote does not ensure your bike is not excluded, it could happen a couple months down the road you get a letter stating your bike wasn't insurable. He was a former State Farm agent.
I'm not sure what the big deal is about the list, I'd think they should be able to tell this pretty easily but apparently the agent can still screw things up (seems like it should be computerized..but whatever). The list apparently might vary region to region, state by state.
I'm 40 with no accidents or tickets in the last x years (3 years is what they're asking now). So I have a great record. The biggest cost difference seemed to be the insurance companys. I was quoted as high as $2100/yr, $900/yr, a couple around $600-700, and $300 from State Farm. I also have home and auto policies. I ended up staying with Met Life because overall State Farm wasn't any cheaper ($200 more for home). Also I had a home claim with Met, and they were fantastic and easy to work with. Also due to longevity, I get extra discounts on deductibles and that sort of thing for not having claims on my vehicles or something, I think right now it's $200 off my deductibles if I had a claim.