Smoke from breathers.
This is the way mine is set up. The breather vents into the bottom of the air cleaner by a piece of heater hose and the blow by is sucked into the carb. I thought that it was actually supposed to work the other way where filtered air is pulled into the breather through the hose. But my engine is so worn out it pulls blow by through the PCV and the breather. You can see the hose on my right (left in pic) valve cover.
I KNEW my engine was worn out when I bought it. I hope that this isn't the problem with your engine.
This is the way mine is set up. The breather vents into the bottom of the air cleaner by a piece of heater hose and the blow by is sucked into the carb. I thought that it was actually supposed to work the other way where filtered air is pulled into the breather through the hose. But my engine is so worn out it pulls blow by through the PCV and the breather. You can see the hose on my right (left in pic) valve cover.
I KNEW my engine was worn out when I bought it. I hope that this isn't the problem with your engine.