Recipee for success...........

-One Zama butterfly carb, about 7/8mm venturi, off a weedwacker featherlite blower
-Make a spring out of a guitar string and it place under the pumping diaphram
-make an intake manifold that works with the carb and gives a "suck pulse" off the intake manifold.

It ajusted just fine for mixture, I picked up some top end RPM, and it now idles down to 1000 rpm with a correct mixture every where in between.

I wish I had a tiny walbro or Zama with normal throttle linkage. This one has a plastic shaft, thumb lever, and detents. It does prove that a butterfly carb can work.

Anyone have a tiny carb, 7 or 8mm in their junque box that they would sell??