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I see that many people use catch cans, some people use the governor arm hole and tap that to add a fitting. They then run that to the valve cover and have a breather tube with filter venting the valve cover. I also see them using three hoses from the crankcase and all three of those to the valve...

I have a chance to get a 70s powerdyne mini bike with a basket case engine. Anyone know anything about these bikes? Thank you in advance.