I just bought a 1976 Honda CB550 to learn on and have noticed that a few drops of oil appear on the ground several hours after riding. The guy I bought it from just had the chain replaced and he said that the oil was coming from the chain. Me, not knowing very much about motorcycles, thought it sounded like a decent answer. That was a few weeks ago and I am now wondering if it is something worse. The oil is coming from the front sprocket. Without taking it all apart, I was wondering if anyone had any ideas about what it might be. I have heard on another forum that there is a seal in there and when the new chain was put on, the sprocket may have been put on backwards and therefor wearing down the seal. Any ideas???