Was heading home from work when my m109r started to have a rattling sound from the right side of the engine. Didn’t have a change in the shifting of my clutch nor did I lose any engine compression. The rattling sound remains the same when I engaged and disengage my clutch. The sound remains the same when I rev up my throttle. M109r rode home as usual only for the rattling sound. Like I said it runs fine outside of the rattling sound coming from the right side of the engine only. Some of my friends say it is the tubalur nut that’s loose in the clutch; but I don’t have no problems shifting my gears. One of my buddies say it’s the exhaust valve that is loose, but it runs mechanically fine outside the rattling. Has anyone ever had this problem before and if so how did you fix it.