This weekend we went for a long trail ride. It was a lot of rocky trails so it was slower and bumpy. Every time I stopped to an idle the battery light flashed? I would give her some gas and it would go away. I checked battery connection and everything was tight there, however the headlights seemed really dim the entire ride. We did ride 150 miles after I first noticed it and we stopped and checked out the sights, and she started right up like normal but battery light flashed at every idle moment. has anyone ever had this problem?