Ventilation

VENTILATION
The gearcase is ventilated through a hole in the top cover of the primary chaincase. The hole is at the center of a plastic propeller secured to the clutch shaft.
When the clutch shaft rotates oil is flung away from the hole by the propeller.
When the clutch shaft is stationary, the oil level in the primary chaincase is well below the hole.
A vent on the chaincase cover compensates for pressure changes in the gearbox.