I have a 2019 F3 LTD with around 3,500 miles. Recently I've noticed a "rattling" coming from the right side of the engine. This occurs at lower RPM's (let's say between 2,000 and 2,600) when the engine ISN'T under load. It goes away in the higher RPM range (3,500 to ...... ) while the engine is under load. It sounds like marbles rattling in a bag. It's not constant and has NO effect on the bike's performance. Oil level is right where it should be. I'm wondering if it could need a clutch adjustment. I've noticed when the engine is cold it takes quite a few RPM's to get the bike to move. Once it warms up everything's fine. That wasn't the case with my 2016 RT-S. The second you twisted the throttle the bike moved.

Any thoughts??