I’m surprised that a gauge to measure the depth of the jet in the Z SU ‘s hasn’t been created. Seems like a little spring loaded gauge inserted in the jet track to expose depth of the jets would be simple for some of us that sell cool products ( 3D printing) on this forum. It would eliminate “how many turns down” which is kind of a screwy way to get where you want to be on your mixture. Anyone agree?

Would calipers not work?

Pretty easy to do, simple scaling down of a surfboard caliper would do the trick. If I get time I'll design one up this week. here's a couple of basic designs.

Edited August 31, 20251 yr by SpeedRoo

How is that any more than just a guess - like the "I'm turning down the knob 2 1/16 turns"? Don't you need to know the AFR created by adjusting the jet position? And isn't the position different for varying temperatures and elevations?

This should probably be in the carb discussion section rather than electronics.