I just bought my first aatv, it is a 04 Bigfoot with 18 hp. It seems to be in good shape. It shifts hard when warmed up and I think the idle is a little high and we water tested it and after an hr. We had about an inch or two in the bottom. My kids and I had a blast on the river but it needs a trolling motor to help go back up stream where it can't touch bottom. Thanks guys. Also where is a good spot to buy a winch and is there roll bars available or just build my own.