My engine has a strange rattling noise. The noise happens as I ride, but probably 80% of the time when I let off the power, in light engine braking. Kind of sounds like a loud rattling sound, (possibly) more out the right side of the engine, and I can feel the vibrations through my feet. The rattling will come in for a little bit, up to a few seconds at a time and then go as the engine slows. It does not happen at idle. It does not have the ‘ticking’ noise that is commonly referred to with cam chain problems. It’s not the drive chain. It started happening only a little bit, but increased to the point where it happens all the time now. After reading the forum, I thought it might be the infamous cam chain tensioner. My bike is 2014, so it would have the original first generation cam chain tensioner. I took it to Yamaha as I have an extended warranty. Yamaha said they didn’t hear anything on the test ride. I don’t know how they couldn’t hear this thing. They said the cam chain sounded fine to them, so they refused to help any further under warranty. I’m not sure what to do. Does anyone know this sound I am describing??