Being an "09 I assume it is fuel injected. If so I could only guess at this.Perhaps 1 or both injectors are leaking for some reason during running or bike shut off. I would think if they leaked while running you would be running rich with perhaps black smoke out the exhaust?If leaking while bike off I would think they would stop after fuel pump pressure decreased. A check for fuel in the oil I have used over the years is to take a plastic tie wrap and dip it in the oil tank. Smell it for gas odor, then take a match or lighter to it,away from your bike, and see if you see little sparkly ignitions from the oil on the tie wrap. If you got them then drain and change oil and filter after you find your problem.The gas will dilute the oil too much and cause you engine trouble. Happens to a lot of Metric bikes when they sit too long.Those are usually carb'ed bikes,different diagnostics though.
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