Insurance rates are completely determined by your location, credit score, and type of bike...
I'm sadly still in Michigan at this point, the land of some of the highest insurance rates in the country, last year at this time I had 4 motorcycles on the road, 2 HD's and 2 liter sport bikes and I was bleeding cash. I'm 53, a credit score that's well over 800 with a paid off home and I've never filed a claim or had any tickets, I've had my motorcycle endorsement for 37 years and taken many advanced riding courses yet I was paying near 3k a year for full coverage, $744 of that to the state in fees tacked on the insurance for the privilege of simply having the bikes. I sold the 2 sport bikes, took the '79 off the road and started a rebuild on that old ShovelHead and only have the '13 Wide Glide on the road this year, switched from Progressive to Markel and brought my rates down to $550/year for full coverage. It was fun to have a garage full of motorcycles but the price of admission in this state is just too high...
Michigan, the land of the downwardly mobile, don't have too many nice things here, I can't wait until I'm out of this garbage hole of a state and back home in Florida...
Typo edit...