[Werner]

The good, the bad, the ugly – I know, like everyone else, I think?


The tube fits into the original vent channel, which I've marked in blue. The vertical hole at the top must be sealed with a short plug (green).
The tube should be as thin as possible; I used 3 mm copper on the outside, it is less than about 1.5 mm on the inside. I glued it in place with your JB-Weld adhesive.

The filter type doesn't matter, as the tube compensates the actualy pressure equalization. This is also important because of the increasing dirt buildup, which increases the pressure difference.


This modification only applies to the Zenith 2 type. Because I have no experience with other carburetors.

I did not change the jets. The engine runs a little bit more ritch. That you can compensate it with the inner turning knob. About +/- 15 degrees. And idle screw.

It's midnight in central Europe, have a good night.