I am not an insurance expert but I suggest looking carefully at your insurance contract. I was looking for a dualsport/snowbike policy through USAA and Progressive. They will also cover up to $5K in "extras". While contracts from company to company and state to state will vary, I suggest ensuring that the insurance contract meets your needs. Are you aiming only for comprehensive coverage (to cover the current value or replacement value of the Timbersled kit and bike) or are you aiming for liability coverage (in the event you accidentally hit someone with your bike) or are you looking for both or any number of other coverages? There's no right or wrong answer here, but I recommend ensuring your insurance company is actually insuring your needs. The best way to do that is to be very clear about the verbiage in your contract. I too am having difficulty finding coverage for the snowbike. Progressive wouldn't do it. I saw the post below about Geico and just called them up to get coverage. I spoke with Geico's motorcycle/atv department and they made it clear that they would NOT provide comprehensive or liability coverage for a motorcycle that was converted to a Timbersled snowbike. They suggested that Geico's snowmobile department MIGHT write a policy for the snowbike, but that Geico would be unable to ensure the bike during the summer months with wheels on if I am converting it to a snowbike in the winter. Personally, I'm not really concerned with cost of replacing my bike in an accident, but I would like to be covered in the very unlikely event that I accidentally hurt someone and end up liable for a mountain of medical costs and damages. Again, there's no right or wrong answer about what coverages are appropriate. Those decisions are for each of us to determine on our own. My aim here is not to go around about what Geico or other companies will or wont do or said or didn't say . . . but instead to suggest that you are crystal clear that the coverages you decide you want or think you have will actually be covered in the event of an accident. Over the years, I've been in a few insurance disputes that were ultimately determined by relatively subtle clauses or exclusions in my insurance contracts.
All that said, let me know if someone is aware of a company that will provide year-round liability coverage and potentially comp coverage for a street-legal dirtbike with a Mountainhorse. Thanks guys!