Ok here's the story. Bike has been (and still is running great). Last weekend I changed my oil. I was at 650 miles, so I decided to change it before a weekend of riding. Usually change it between 500 and 800 miles. Went riding Saturday and all was great. Sunday I went out for another ride and noticed that my top end was rattling more than usual (bike has always been pretty quiet as far as DRZ's go). Did some research and had a hunch it was the auto decompressioner. (Im running Hot Cams from 2006 with about 11k on them). I figured I would pull the valve cover and check the exhaust cam and valve clearances. The valves are is spec according to Hot Cams specs. The auto decompressioner had a lot of side to side play and probably 1/32+ of rotational play. It was very loose in all aspects. I decided it was time to remove it, so I did. Put the bike back together and went for a ride. The majority of the noise went away, and it sounds pretty DRZ ish now, but it still has a slight rattle/knocking noise that historically wasn't present in the bike. It's not the cam chain, I can loosen the mcct and get the can of rocks sound, and make that noise go away by tightening the mcct. The rattle/knock is most present above idle, maybe 2000 to 3000 RPM, then seems to quiet down above that. I decided to change my oil again today just to inspect it (has been 250 miles since the last change) and the oil had tiny sparkling particles in it and on the magnetic drain plug. I filled it back up and started it for a second to see if I could pinpoint the sound. It seems to be coming from the head, but is not very loud at all. To be honest I'm not positive is any louder than it has ever been because now I'm trying to hear noises, so I may be convincing myself that the noises are more than they are. This doesn't explain the glitter in the oil though. Is it possible that the particles are from the loose auto decompressioner? Here's a little info on the bike: '06 sm with roughly 13k on it. Installed hot cams at around 2k miles Installed a 95mm cylinder with weisco high comp piston, and FCR at around 2k miles MRD exhaust What do you guys think may be going on? I'll probably pull the head and cylinder this week and see if anything obvious is going on. Assuming everything looks ok, should I replace the piston and rings while I'm in there? Any other advise, comments?