okay so i have obviously a kfx 450. it started great yesterday under its own power. went to start it today and it would not. so i pulled it behind my prarie 360 and bump started it. it idled then i put it in gear and drove it. pulled the clutch in to wait for my girlfriend and it stalled. it wouldnt start under its own power again. so i bump started it. it ran really rough. if i held the throttle in one position it acted as if i were blurping the throttle. and the exhaust smelled real heavy with gas. it had a new spark plug 2 months ago. and a full system check done by the local dealer. the only thing i can think of is it is a bad fuel injector. please help i have a trip planned with my girlfriend on aug. 1 so i need to get this fixed.