I have a question about a rattling/vibrating noise around 5k on my bike. I notice it the most when cruising along at 5k. If I go under or over 5k the rattling/vibrating noise seems to diminish. Any info on what this noise could be? I heard that the cam chain tensioner makes noises when it starts to wear. I wasn't sure so I thought I'd post and see what everyone has to say.