I have a 09 summit 872 almost no miles on the new upper end, took it to the dealer here in the area which is no longer a dealer, they plugged into the computer and made sure all updates were current?? got it home took it out, and didn't get a mile on it and the message Knock Sensor and beeping is rolling across the gauges, checked all plug in , all was good, even r&r the knock sensor , I run non ethanol fuel with a gallon of 110, any one have this problem??? my next stop is back to a different dealer