Ventilation of the crankshaft housing BigTwin 1.890ccm How can the pressure in the crankshaft housing be reduced without losing the motoroel? My engine still has the crankshaft housing ventilation at the bottom of the crankshaft housing. After a longer service life or after a fast highway ride, the motoroel pushes out of the ventilation. The amount is too much than that it can be fed through the intake hopper of the carburetor of the combustion. Who has an idea? Thank you very much!!