OK OK... I trumped it up a little, but I am sitting here comparing two #165MJ's... one has the little Keihin star logo, the other is of unknown manufacture with no logo. The no-namer is 1-2 mm deeper at the aperature end(not the threaded end). I compared my other keihin jets to no-name and they all have the same 1-2 mm diff. Does it matter? Are origional Keihin jets superior? Is this not a major variation for something as precise as carb jets??