As some of you know, I have occasionally posted about a noise that sounds like a spun bearing that would happen for a split second on my bike. I have not heard that noise in a while, until I changed my oil a few days ago and once again the noise has returned. It always seems to happen when I change my oil and for a few hundred miles after I change my oil it will occasionally happen. The oil change has to be related, I just dont accept the its a coincidence. I believe it may do it if the bike sits several days without being ridden though that rarely happens with me. Any thoughts on what this could be?