Harley TwinCam Crankcase Ventilation

This video is about fixing the crankcase ventilation design on Harley TwinCam models. Instead of sucking oil mist from the valve covers into the carburetor, the valve covers are vented to a secondary air cleaner.

[@mitchmurray117]

To follow along put your brain in slo-mo.

[@longboardalways]

Vacuum in the crankcase increases horsepower.

[@thomaseverley3847]

I was coming to say the same thing.