I’m trying to identify these two needle jet holders. #1 is from my stockpile of jets/needles/accessories, #2 I suspect is an MC28 HRC item from a set of MC28 carbs.

#2 is thinner, but with a larger hole running through it. Also if you look closely it has a little hole at the bottom whilst the other has it mid way up.

Also does anyone know if the Slow Jet & Pilot Jet differ between std and HRC?

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