Ok guys this is the problem. I was out riding and my quad started bogging down like a foul a plug. I stopped and changed the plugs and it seemed to get a little better than it did it again and we thought I had sucked some dirt into the carbs and clogged them up so we called it a day and went home. Today I cleaned the carbs one at a time so I didn’t mix anything up. Put everything back together and it fired right up and revs like a champ in neutral. I put it up on a tire with the wheels off the ground and shifted into first and it revs like it should, but as soon as I put it on the ground it just bogs and wont rev. it’ll tractor around the yard at like 2 miles an hour with the throttle held wide open but that’s all it does. Does anyone know what it could be? oh yeah and i have no tors and no parking brake they have been gone for a wile now.