Call every single company you can find a phone number for!
I say this because you will find that the rates vary ALL OVER the map, from company to company, with no apaprent logic.
I am 51 years old, perfect driving record, and my quotes varied from a low of about $673 for full coverage with high coverage limits and a low deductible, to almost $3700 (!!) from one company that was particularly out ot lunch.
The best quote I got (might be very different for you) was from Nationwide Insurance. This was $100,000 / $300,000 / $50,000, with $250 deductibles on both comp & collision, for $673. I heard from a couple of people that they supposedly did better, but when I checked their coverage limits, they were lower limits than what I show above.
I think I would have gotten another few percent off if I had taken the MSF Experienced Rider Course BEFORE I bought the insurance. I took it after, and will ask about a discount upon renewal.