This jet is identified by the numbers 224 being stamped on it but you may also find that there are other needle jets that though having a different series number stamped on them, are in fact identical to the 224 and thus interchangeable. The 224 series are used in our VM44 and some Vm40 carbs but often not in the original equipment versions of these carburetors found on production bikes. These NJ’s use a HEX 4/042 type main jet which is a different thread and sizing scale than the round type main jets.
The lower the letter and number indicates the leaner the jet. Example BB-2 is leaner than BB-3 but do note that with this item the Z’s are leaner than AA and so on. These are in 0.01mm increments and the 1/2 size 5’s are in a 0.005mm increments. Only the shown sizes are available.
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