Not sure what you chose; but yeah Progressive's quote system is messed up for 2018 1000cc bikes. You can put in any other 1000cc bike and you'll still get some ridiculous quote (well at least here in the DMV area, no matter what age and info you give). Last year was even worse; they finally updated their site but still gives something silly compared to any other site. I even spoke to an agent over the phone and they couldn't explain it; when I gave them the VIN for an actual quote the price jumped even higher.
You can get a realistic quote for the V4 on any other insurance carrier. I went w/ GEICO because they quoted me lowest and ended up moving all my bikes over too.