I bought a 2009 with 2700 miles on it in April. When I was shopping around I came across several 09's with low mileage. Strange coincidence I suppose. I have the same pop on deceleration from air intake system. Bike runs greatI just bought an all stock 2009 with 2700 miles on it. It is A USA bike with California EM .When riding and I let of the gas it pop or back fires two or three times.,. what is wrong with it?