Ironhead 1960 XLH, oil leak issues

hi

know its been mentioned alot , as i used the search before i posted this, but, when you kick the xlh over, she sounds like one of those sucker plungers you use to clear the sink in the kitchen , suuuuuuuuuckkkk, as the pistons moves up or down the cylinder, followed by a load of oil dumping out the chrome breather pipe that vents out under right hand case, any ideas? spring loose or ball bearing dirty and unseated ??


steve