how do i get the crank case breather to stop oil coming out when im starting it? it just pours out. it stops eventually. the bike is a 1974 74inch thanks

 

I suspect a leaking ball check valve in the pump. it permits the oil to drain into the crankcase when parked. Then upon start-up, you have a wet sumping condition that causes the oil to go overboard through the crankcase breather.

Harley manual states in trouble-shooting area:

"Excess Oil out of Crankcase Breather when starting Engine

1. Oil pump Check Ball Stuck open.
2. Poor seal between feed and return gears in pump."

I've run into this problem several times. Most often it is contamination in the oil system that causes the ball check valve to stick. Once, I had a bad gasket in the oil pump that was allowing leakage between the two sides.

Good luck.