I have a noise coming from my transmission/primary area that sounds like ball bearings being spun on a rope flapping against metal on my 2011 Heritage. It’s heard best at around 62 to 65 mph in 6th. gear when your only giving it enough throttle to maintain speed or just a tad less maybe slowly slowing down. I can make it do it in 5th as well at around 45 mph again just enough throttle to maintain speed. The Transmission/Primary has to be hot. All is quite when it’s cool. I can throttle up and the noise goes away as long as I’m throttling as soon as I let up to maintain speed or say going down a hill it’s back. After reading all over the internet I’m wondering if the primary chain is loose. I’m going to carry it in but just wanted some opinions first.