I had similar issues while I was researching as well.......I am really amazed any insurance agent would know the cbr and cb share a motor, unless they are an avid sport biker.
Every insurance company I looked at didn't even have a listing for the CB1000R. All the companies I tried to get quotes for did not initially show the CB1000R just the CBR1000RR. When I first got all the quotes it was down right ridiculous, between $1500-2500/YR....obviously I pointed out the error seeing as this is a sport bike & not a super sport. I was able to get some companies to actual make a listing or reclassify the bike entirely. In the end the price came down considerably but is still higher than any other bike in it's class for me. (ie. z1000, speed triples, fz1, etc) For example I was able to get my current company to insure my bike with full coverage @ $600.00-700.00/YR. I am not exactly sure since I was able to add a second motorcycle to my plan for practically free, my insurance actually went up without the second bike. Just shows you how screwy insurance really is, my insurance agent was even amazed.
So to compare every other bike I looked at (ie. z1000, speed triples, fz1, etc) was generally around $300.00-$500.00/YR. The CB1000R was always more expensive even though most of the other bikes actually have larger displacement engines & more horsepower/torque! Possibly because of the rarity and cost of the parts due to this?
Just make sure whom every you are receiving a quote from leaves off the "R" on "CB" & "1000". People who don't know bikes generally just hear "CBRRRRRR1000RRRRRRR" lol
My 2 cents and my experience....obviously these #'s will differ greatly between individuals. I am interested to know what everyone else in the US pays?