Harley guys use some sort of dry teflon spray to quiet theirs. Mine has been a chirper on and off. Sometimes no chirp for thousands of miles, then it'll start. I think the wheel just has to be aligned and th belt adjusted for tension a certain way and it'll quiet down. I think it's just something you live with. But compared to chain drives it's a blessing. Chains are snatchy, noisy always, greasy and a PITA.