This jet is identified by the numbers 261 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 261 and thus interchangeable but if at all unsure about an exact match please contact our office direct. The 261 series are used in some of the old VM29-33 Smoothbores found on production bikes.
The lower the letter and number indicates the leaner the jet. Example N-6 is leaner than N-8. 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.