I have a Gs550E 1978. Think its had a fair bit of stuff changed on it. I have recently noticed oil leaking out of the left hand crank case cover. I was a bit surprised there was oil in there at all and have presumed that this is a fault however have read posts elsewhere that this is the norm. Can anyone verify this for me. I have stripped the magneto off and the starter motor clutch and there is an oil seal behind this which is fairly worn or may even be the wrong size. Its not just a light spray of oil. there was a good few mills of oil in there.