The atv market for race fuels is much smaller than the sleds. Other than the odd modded Banshee you will not atvs that benifit from race fuel. Money spent on a 6% increase in power on an atv is better spent on one time cost mods.
When discussing engine work with my customers, they usually refuse to do mods that will result in the use of race fuels or mixes of fuels. Premium fuel is as far as they are prepared to go.
I do have one customer that uses a race fuel mix to control dentonation on NOS, but he has a 22 hp NOS kit on a 32hp machine. He has no gain on the fuel by itself.
The Hinton area has by far the highest denisity of Banchees in the province. Any of them that are running with heads less than 21cc need at least a mixture of fuel.