As noted above, there are a lot of variables involved in what you will be charged for insurance. For one person, Progressive may the be least expensive for given coverages, but the same coverages for someone else may be less expensive with GEICO. Also, just because someone says "I have full coverage" and it costs $300 per year -- don't think that your quote with the same or another company for $800 per year must be way off base.
I carry $500,000 CSL for liability and UM, I have med pay, and I have collision and comprehensive with low deductibles. That is my ful coverage. Someone else with no UM, higher collision and comp coverages (if they have them at all) and liability limits of $25,000, wiill hopefully pay less than me, if everything else (age, credit rating, location, type of bike, etc.) are the same.
The best thing to do is to shop around and see what prices are quoted to you for your circumstances.