Anyone ever hear of brakes locking up on a Sportsman 400? My quad runs fine until it gets warmed up. Once it is warm, the brakes will start locking up and will lock up solid until it is cooled off.

 

sounds like your brake pads are missing or the disk is warped.

 

i have never herd of that happening w/ any atv before

 

I think 20045sp500is right. It really sounds like your pads are gone and the calibers are over extending and locking up. They are easy enough to get to. Take out the pin and remove the pads if there are any left. I haven't changed the rotor or anything but the pads so far, but if you need assistance I do have the manual and cen relay the information needed.

 

Never heard of that either..............

 

This same problem happened on my friends Honda.

 

Thanks for the responses -- I will get some pads and take it from there.