This is the 2nd time my brat has done this it just randomly starts and it misses and spits and sputters if u arent wide open to the floor but if u mash it wide open it runs fine. Whats wrong with it??

Sounds like a carb problem, or something fuel related. When's the last time you changed filters?

Filters wouldn't be an idle issue. They would be a part to full throttle issue. You've probably got some crap in the bowl that is clocking the idle circuit. Quick fix you can try is to turn the mixture screw all the way in and count the number of turns til it bottoms out (stops). Then take it out completely. Blow compressed air into the hole. That might unblock the circuit. I've done it a number of times on many different carbs. If it doesn't work, you'll need to overhaul it.

Filters have just been changed last time i vleaned carb good it fixed it for about a week?