Well, just got my baby back together(thanks to those of you who answered questions I had along the way) today and fired her up for the first time today, man it was nice to hear her running again after being in pieces for 2 months! So, I check to make sure everything is running correctly, make sure I have oil pressure, everything looks great. Take her for a little spin, perfect. Everything is running perfectly. After my initial excitement and pure joy to just being riding my bike again, I settle down and listen closely for any strange noises. Right away, I notice a soft metallic hissing, coming from the right side of the head when I rev the engine:foul: So, I put my thinking cap on, trying to figure out what that noise could be....CAM CHAIN? It was the one thing I didn't replace during the rebuild, it didn't show any excessive wear, and at $90 after I'd already spent $600, I figured it would be fine. MAN, I AM AN IDIOT!!! One of the most difficult things to replace, one of the most crucial components of a 4 stroke engine, and I make the decision to use the old one!!!???!!! WHAT THE HELL IS WRONG WITH ME???!!!??? So, I'm posting here, because I'd like to know what options I have, if any, other than replacing it now. I REALLY don't want to tear the whole thing down again to replace that thing, but if that's the consensus I get here, that's what I suppose I'll have to do. If it wasn't that worn when I tore everything down, is there a chance that everything just needs to break itself in and I really don't need to worry about it? Is it possible that it always made that noise and I just never paid that close attention to it and everything is fine? Someone give me some good news please, because at this point I'm ready break down and weep like a 5 year old if I have to tear the whole thing apart again because of one STUPID mistake.