I'm still somewhat a newbie with my Atlas. On longer, higher RPM rides (even short jaunts on the highway) the oil tank seems to get pressurized and oil oozes from the tank cap. Generally, when the engine has been running for extended periods of time (and is really hot for awhile) the engine gets a little "weepy" all over. No one spot/gasket is really "leaking," but it gets kind of messy throughout the day. Now, I realize some of this is part of the charm of a 44 year-old bike and I love it, but I am just wondering if the oil pressure overall may be a little too high? Otherwise, once I had the magneto rebuilt, the bike runs absolutely perfect and is exceptionally strong. I don't want to mess with too much until I need to. Any thoughts?
#2. "RE: '67 Atlas oil pressure" In response to Reply # 1
The crankcase breather dumps into the oil tank. So there is a lot of wooshing of air in and out.the tank breather. It does pressurize but not from oil pressure but crankcase air....
It then picks up and blows around the oil coming back in the oil return line and if the cap is sealed with an old cracked gasket then you get wet.