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A little lathe work?
I've been following along, great work bringing back to life such a cool bike!
Inject oil into the crankshaft and put extra oil in the bottom of the timing and crank cases (only pressure oil feed is to rod bearing - the rest is splash).
Actually, there isn't any pressurized oil. The oil pump sends out a stream of oil via a long tube. That tube aligns into the center of the hollow crankshaft. There is plenty of space between the oil injection tube and the crankshaft inner wall so no real pressure develops. The injected oil just fills the hollow crankshaft and then immediately gets flung away by the spinning rod journal. Even the rollers on the rod big end are just lubricated by the oil oozing out as it flings.Patrick HayesFremont CA
True, there's no seal between the quill and the crank shaft.
My bro's Vincent Comet is supposed to have a seal there. A mechanic who fixed it after the first owner got wiped out by a car and smashed the engine case didn't know about it and omitted it. The big end did over 50,000 miles but it regularly shred the cams and followers. It was only after he stripped it to do the big end he found out about it.Very basic, just a spring loaded seal that seals the quill and the crank. You would wonder why Guzzi didn't do something similar.
Guzzi doesn't need to because it's got a roller cam that needs very little oil.