My problem is that when I'm in 1st or 2nd gear (probably happens in all gears) my atv wants to go forward by itself, slowly mind you, but it still goes forwaerd even when I'm not pressing throttle. I foiund out in order to stop myself when I come to a stop sign or corner or whatever, if I pull out the choke it will slow right down, you know, like I could make it seem like a normal stop. Another thing I tried was I turn the bottom big screw under the carb either way while I'm driving (in 1st or 2nd gear) but I could only dial it in to the best it can get. (still not 100%). 1996 big bear 350.

 

If it's creeping in lower gears your idle is too high or your clutch plates needs service...

 

A lot of different quads are built that way and actually are supposed to do that. Did this just start happening or has it alwase been happening? If you want to stop just go to 1st gear, hold in the clutch and hit the break.