Sorry, no pic. I just got my 80W iron, some Yorkshire flux and put a lump of solder on the c shaped cutout. Then flattened it and made it to the round profile at the edge using needle files. The idea being that most of the air runs around the jet rather than straight over it, thus leaning the idle mixture.

Given time, multiple jets, drills, butterflies and lots of tests a better job could be done. It leaned the idle out and seemed to be enough to get what I wanted.


My experience is that pretty much any Walbro WT will run these engines. How well, depends on what time you have.