AlexL
Shiny Side Up
Back from the dead. I am reviving this thread because I am experiencing the sound described by the OP. Sounds like marbles in the top end. Not valvetrain noise, not my chain, and despite my exhaust being super loud I have actually picked up on this new different noise. Not super loud but you can hear it rattling just off idle when taking off. I found the OEM replacement on bike bandit for $106 and I'm going to pull the trigger. The bike only has 14,000 miles but the $106 seems worth it for a little insurance.