Just got a Street 750. Shopped around for insurance. Age bracket: 50+, no accidents, married, etc. I ended up choosing esurance; I also have esurance on my autos. My bill for the XG750 is $75 - per YEAR. Yes, you read that right, it's $6.25 per month, billed annually, $75 (plus a $2 fee, so $77 total for 2016). And that's for the highest liability coverage they offer (I think it was $250,000/$500,000, something like that). No collision or comprehensive or uninsured motorist or any of that stuff, just general liability.
Do be aware that esurance seems a tad bait 'n' switchy; they've been raising my auto rates by about 20% every renewal, so I'll have to switch away from them sooner or later. So definitely shop around, Progressive was like $360/yr for the same coverage, so you never know what you'll find.