These high quality replacement jets are exactly what's needed to get your old bike running and idling smoothly.  They are manufactured in Taiwan to high tolerances guaranteeing and exact fit and proper function every time. 

The 99124-076 type jets from Keihin are original equipment on the early Honda CB Fours.  They will fit CB350F, CB400F, CB550F, and CB750K models.  Check the dimensions below to verify these are the correct replacements.  Please inquire if you are unsure of the fitment for your model. 

Length, overall = 28mm
Main body diameter = 5.5mm
Thread diameter = 3.4mm
Tip diameter = 2.0mm

NOTE:  These jets are very similar to Keihin N424-24 jets but shorter.