Have a 06 Wideglide with 36K miles on it. I just changed my full face helmet to a beenie type to help in this heat wave we have had out here. I now hear what seems to be a loud chain whirring noise when riding my bike. My question is how loud are these chains supposed to be while spinning in the closed case. I removed the primary cover to inspect the chain and tensioner and all looked almost new. No signs of obvious wear, no metal shavings on drain plug magnet. Are these chains always that noisy?. Thanks PS the reason I mentioned my helmet change is the full face blocks out much more noise.