Dyna jet, Mikes XS, Mikuni. they are all manufactured in similar fashion. (lathe) Instead of labeling which is "good", accept that some of each are made better than others of each. All depends on the cutting tool condition of that day and who made them. I have used all these brands with great success over the years. Take the initiative to inspect carefully ! Clean it up if needed. I've found for example a Qtip shank will polish or say de-burr a too sharp or dirty edge break on a needle & seat. Inspect cross holes, edges, Trust only yourself ! I would never just install carb componets assuming the quality is good.. If a component looks suspicious, get a different one.. It's kinda like "measure twice, cut once" Inspect Your components ! Trust no mfg just because of the name. Success is on You !