No, I haven't been using the WT-499. I have one, but haven't needed it as yet. With all the Gas/Glow conversions I have done, the most I have had to do is raise the regulator lever a bit to get the carb to go rich enough for use with the Gas/Glow fuel. I've even got a 48cc twin that I made running on Gas/Glow with just a WT carb.

There is a WYK carb that has twin adjustment needles ,(many of the WY series carbs don't have twin adjustment needles, and having them is absolutely mandatory), and seems to work well on four strokes, but unfortunately I don't have the number. Maybe someone will jump in here and let us know.

Well, here is one I found, but I don't know if it is the one the other guys playing with four strokes are using. You might do a "WYK" search here in the forum.

www.davesmotors.com/s.nl/it.A/id.4132/.f

AV8TOR