Very fine powder passing the strainer?
The filter in the petcock work fine on my 2 bikes. The earlier 2 piped petcock. But not old, ordered 2013-2017.
I have a feeling that dirt will come with fuel from the gas station.
As here. No fuel starvation.
My K2 had fuel issues. It was the soft stock type non braided fuel hose from Yamiya.
It can be bent so fuel will starve.
Close to where connected on carb pipes that can be angled wrong. When adjusting air screws, move hose away for easier acccess.
Hose can be a little nicked, enough to act as too small main jets
Before checking low float level or go bigger on main jets, check fuel hose routing.
