Thanks for the input, guys.
Greg, if you wanted to measure the bleed holes on one of your nozzles that would be great, I think it would help me to understand how the M-53 nozzle compares to the M-74B (I understand the holes are smaller, I would just be curious to know how much smaller).
Panic, I think I understand what you are saying about the OE nozzle not being the best solution for any but an original K engine. I was looking for the OE nozzle because I was thinking I would be best off if I started at the OE setup for a baseline & then "tuned" from there. Fiddling with these parameters is what maybe we might call "jetting the carb" on something with a bit different configuration, eh? I appreciate the comment that the M-74 bleed holes are too big - that tells me which way to go when I start changing hole sizes. As far as your comment about "Those who do the most R&D will have the fastest bike" - I fully agree - right now I'm working on the "R" part of that & once the beast is running I can start on the "D" part!
Thanks again -