I have a strange rattling noise that i can only duplicate while riding. It is on the right side, down low. It almost sounds like the chain slapping up and down, but i can see that chain and dont think thats it, plus the chain isnt excessively loose. It happens at lower rpms, on harder acceleration, for example if im in 2nd or 3rd, and slow down for a turn or something but dont shift down, and accelerate out of it, and it usually is only for a couple seconds. Cannot hear it when idling or at high RPMS. I know my description is horrible, so i apologize for that. Bike runs really well.