sputters at mid rpms. low rpms are fine takes off no problem but when i hold it to mid rpm not WOT it will sputter. i can smell gas real bad when i let off and am at a stand still. i have a free flow exhaust on it. i checked for vent lock in the tank by loosening the cap but it doesnt help. i dont know what else it could be. HF wont take it back because i voided the warranty lol by removing the gov.