I have an 04 zx10r with about 14,000 miles on it. I have noticed the past few times that I have rode the bike there is the slightest bit of oil leaking out of the left side of the engine near the top of the engine. Anyone have a clue as to why this might be happening? I am taking it in for service here shortly to get the valves adjusted, change the spark plugs, and put a new chain and sprockets on her. (-1, +2). Has anyone had this happen just wondering if it is a common thing or if it is just me. Thanks so much for your help.