Mike Rocket
Rocket 3
I think the oil is draining into the gearbox and is not actually in the crankcase being whipped up by the crankshaft. The crankshaft is higher than the sump. It's not foamining the oil and it appears not to cause harm or any back pressure.im thinking older bikes the anti drain valve is not doing well. I noticed mine change from several days to next morning tank empty, all that oil in the crank cant be good.
Most of these bikes are draining down from what I hear and read.