Yes there is. It’s a bit much to go into here, but what it amounts to is it’s coverage for everywhere BUT on the track. I believe it’s generally referred to as “Off track and storage”.
Check with Michael Davis Insurance. He handles insurance for WKA and such. 440-338-7007 If you’re a WKA member you get a substantial discount. It covers everything from your trailer and karts down to your tire gauge!! You take an inventory, calculate a reasonable replacement value and Michael can give you a quote.
Most of us would be shocked at how much we have tied up in kart stuff. And if the whole mess is stolen or burns to the ground, it would be a huge set back.