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A recent purchase of a 55 Pan revealed that the PO had left it sit several years w/o draining the fuel. When we put fresh fuel into the tanks, the carb started to leak indicating the needle valve was stuck open. Removed the gummed up carb for soaking and noticed the telltale dried fuel in the bottom of the intake manifold. Now I'm wondering if that gas didn't leak past the cylinders and down into the crankcase. Whats the best method to inspect and or/clean it out(other than teardown)? Engine was given a complete rebuild just prior to being put away.
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Since the bike sat for so long, changing the oil would be a good thing to do whether or not some fuel had leaked into the crankcase.
Remove the drain plug. Allow new oil in case and slowly kick engine to hopefully dislodge any dried fuel. Reopen drain and kick again to try to get out. Let the oil drain on paper towels to see what may have been in there.