I don't know if your whinning noise is the same that I had, but mine was coming from a misaligned exhaust. After realignment some, not all, high pitch noise went away. Changing all of the lubricants help some also. My Z8 is so, so much quieter now and I don't have to use earplugs any more. With that said, ear plugs do help keep dust from getting deep into my ears.