This has me boggled. I noticed a spot of oil along the left edge of my gas tank. My bike was on it's kick stand so that's most likely why the spot ended up there. I'm thinking to myself, how the hell did oil get there?? I put my bike up on it's stands and raised the tank. The underside of the tank around the fuel pump has a light coating of oil, weird. Not heavy enough that it's dripping, but when I ran my finger across the area oil built up on my finger. My first thought is it must be coming from the rear cylinder as it's located under the pump. I thought perhaps the vent line wasn't sealed or something like that. Here's the weird part. There is no residue on the rear cylinder valve cover area. Where could this oil be coming from. I looked around the airbox, and it's dry. It's gotta be the rear cylinder but I'll be damned if I can find it. I ran it for awhile and couldn't see anything. Really has me puzzled.