Here I pull the pic back up and repost what was in the other thread;
The holes are so small on the inside plate you have to use bright light to see thru or a magnifying glass. Here is a photo - KK made two types back in the day as shown.
There is very little pressure feed to the tank when at idle only when you open up the throttle building engine pressure does the wee lil hole make a difference.
Using enameled motor winding wire:
Here are the specs based on 38g wire passing thru the hole.
0.00397 inch
0.101 mm
Also note the radial mount allowed a 34g wire to pass thru.
34g / 0.00630 in. / 0.160 mm
Here is a 2.5min vid of me setting up the low end on pressure with a 3/4oz pill tank runs the entire time mostly low idle (without flooding) before the tank runs dry. Note the additional back pressure with the exhaust extention to help keep the noise down at night (normally won't use for flying) Will post a inflight vid as this engine will be on a new plane this month. The Tarno carb has an none adjustable airbleed hole.
Needle setting was about (after messing with it) 1.3 ish turns. APC 5.7x3
