hey my 250r bogs down and runs liike crap when the petcock is set on on when i put it on reserve it runs fine. It does this even when i have a full tank of gas i dont know the problem please help send me a private message if at all possible im not on here all that much

 

turn the gas on on. Then take the gas line off of the carb (but keep it on the pet ****). see if the gas flows freely. If it dose you have a diffrent problem. If it dosent then take the pet **** off and clean it, along with the gas tank.

 

exactly. clean clean clean!