BTW, came across this from five years ago. Did anyone try it?
I drove mine long enough to heat the oil, pulled into the garage, and placed a low oil pan under the BB. I unscrewed the big lower drain plug, and let the hot goop flow out.
I opened the upper fill plug just above the drain, and let it all stay open and dripping overnight.
I plugged the bottom drain, and refilled the top port until it back dripped.
I plugged the upper fill port, made sure all was tight, and went for a ride.
I did this 4 times, using Moroso Climbing Lube, drained it hot each time, and got more of the black goop out each time.
By the 4th oil hot oil change, the fluid coming out was the same color as what was going in, and the BB is now, well almost, quiet.
