Hey guys, I have a 06 M109r and while I was changing the exhaust the other day I looked into the exhaust collectors on the jugs. The rear jug was all black from the carbon but the front jug was clean! It was like someone had just slapped in a new cylinder that had never been run on the bike. Like eat off it clean! I have never had any problems with the bike. Always ran smooth and lots of power so what gives? I haven't checked the spark plug color. There is no discoloration externally that might indicate the front cylinder was lean. Any of you guys run into this? Thoughts?