One of the great past-times at motorcycle events is to gather about the bikes of an evening and chat it all up over a pint. Little goes unnoticed by the enthusiasts and at Barber Vintage Festival some keen lad noticed a wee drip on the ground under the left rear corner of my sump. Engine oil.   Groan . . . wet alright, the entire back corner. Arriving home I found this:   But felt a glimmer of hope finding the dip stick O-ring all flattened out:   Cleaned it all up and applied gstall