Hey guys. My neighbor just came home with an 05 predator. Appears to be in good shape. Idles smooth as can be and seems to run very strong and smooth. But it's got kind of loud whine / chatter / grind while going down the street. Sounded originally like a dry carrier bearing, but it rolls smooth and quiet by hand. Waxed the (very dry) chain. No difference. Our dirt bike racer neighbor thinks it's maybe the cam roller chain. His hi-perf bike makes the same noise. Any thoughts?