So I bought this:
After examination and measuring:
Slide = 30
Needle = W7
Atomizer = 264 AU
Idle Jet = 50
Start jet =60
Main jet 80 something...
I've got this on a V1 Polini/MLM Peoples pipe and a 19mm intake. Currently with a 78 jet and a 45 idle jet. Definitely 4 stroked at 80+ main. Seems to run pretty well and stays below 350 degrees unless I'm WOT for extended periods.
I'm going to eventually change the gearing from 10/34 as its faster than I need.
I'm very satisfied with this carb. The only "adjustment" was to sand the float bowel flat and make a new gasket. Probably didn't need to drop the idle jet to 45 but it seems less likely to load up at idle.
For $26 I didn't mind the extra detective work and fiddling. Maybe I got lucky
Andy? I know you'll weigh in on this...