The carb on my 1886-01 it allowing fuel to flow (and i mean FLOW) thru the atmospheric vent hole on the carb. Ran fine day before, actually really great, sat over night, then next day went to start it up, and fuel was filling the carb to the top thru that hole....overflowing into the oil pan. Tore carb apart, everything looks just fine. I think she's a bit fickle. Sometimes she runs, sometimes she doesn't.