I changed my oil two days ago and noticed a fair amount of oil leaking from the filler cap after riding. The o ring is in great shape and seated, cap obviously tight. What I did notice when I changed the oil and filter was that it took about 4.7 quarts to get a proper reading in the sight glass, when the manual calls for 4.1 quarts. Would half a quart cause it to over flow from the cap?

 

Did it leak before the "laying on of hands" ?

 

it just means you didnt give the oil time to Settle,you have to take oil out and than set it at its mark.

 

It didn't leak before

What I did was drain, change filter, refill with 4 quarts, started and let warm up. level was right below lower mark, so I put in a little more, waiting 5 minutes, and checked again. I did that a few times until I got it right below the top line, but maybe I didn't give it enough time to settle.

4.1 is max for a change, I always tilt it onto the side stand to drain as much as possible so I figured I may have for a little extra out. Seems like I put too much in, its just weird it would leak from the cap.

 

So is this overpressurizing the crankcase from the increased oil volume? (downward motion of pistons increasing crankcase pressure)
I am thinking the filler is at the top of the case so there must be a significant atmospheric pressure increase to blow oil past the o-ring. (since liquids don't compress)