Zenith-2 modification

[Werner]

Hallo und guten Tag miteinander.

I'm looking for collective wisdom from anyone who has already done this. with success or failure.

When I look at the carburetor's intake port, I see that the venturi insert protrudes about 1.25 cm into the intake port before it rises at a 90° angle.

This is bad from a flow perspective. Does anyone have experience grinding down this crescent-shaped opening?

The cylinder filling should improve. But perhaps the mixture needs this swirl edge to vaporize more effectively.
The designers must have had some reason for doing it this way. Or perhaps they genuinely didn't foresee this disadvantage.

I don't want the engine to rev higher. But a little more power uphill would be helpful.


Dankeschoen voraus!


Note: The attached image is not my copyright; I've only borrowed it from an for an online display.