Thanks for the tips. I will be trying all three at the first opportunity. I already know that the baffles are loose, but the noise just didn't sound right for that. However, you are right, no harm in trying that first. This is a retired Police bike, so the clutch could be worn from excessive use. Maybe I will get lucky, and not have to split the case. I will post the results. This forum is great for gathering knowledge from several sources. Thanks again, and any other ideas would be appreciated.