I ride a 2015 fz09 and around 4 thousand miles I started to notice a vibration when cruising along between 3 and 4 thousand rpm. This occurred when not really accelerating or decelerating but more of a neutral load on the drive train. It began very but continued to get stronger with time. I took it back to the dealership and they said I was crazy. Over time it continued and I have already replaced the chain and sprockets, the clutch and clutch basket. The thing is that pulling in the clutch clears it up so I was sure that was the culprit. I am wondering if anyone else has had problems like this and if so what was determined to be the cause. The vibration is driving me nuts and I can't afford to continue stabbing in the dark. I would just sell it if I thought I could get on something else that would pull as strong. Please advise if you have experienced symptoms like described.