Same thing happened to me with the local dealer in Bakersfield, Ca. Never, ever trust a dealer or their mechanics to actually take the time to fix the problem, always check the work they do and request any parts they supposedly changed. All they want to do is get your money and get it to start and out the door. Before I wised up the dealership " rebuilt" my carb which did not fix the problem but it was running when I picked it up. I finally had my quad fixed when I started doing my own research and buying my own parts and fixing it myself. When I took the carb apart myself it was so obvious which parts were worn. ( I think all they did was change a plug and call it good) so much for our service economy.