I've been running my Maverick without the CVT cover, but I'm seeing a lot of damage from too much sand getting in there. I've been running the CV tech primary, and it has obvious signs of sand wearing it faster, and then just this past Friday as I was putting the stock primary back on and I noticed three bad grooves on each of the secondary fingers so it to me isn't worth running without the cover on. I ran my rhino without one for 3000 miles I never had a problem. But it's just not working out the on the Maverick. Also, even though I have the exhaust wrapped and a heatshield around it, I think there's still too much heat from the exhaust in that area making another reason why it's better to have the cover on.