i first tried a 1.1/5 pvc but the motor bogged down when i gave it gas then i went to a 2in pvc and it does the same thing someone told me my foreman had to be jetted is this true ? any answers on why it not working i have tried turning the top tward the wind and away from the wind and it still acts like it is not gettin enough air to it i have a high flow filter for it!