Description
This Keihin N424-204 pilot jet is the vintage long-thread style also identified by OEM reference 99124-300. It measures 28 mm overall with a 3.4 mm thread diameter and suits 1969 to 1976 era Honda CB750 K, F and A carburetors and other vintage Keihin carburetors using this exact style.
Match the installed jet and required size before ordering. The similar-looking 99124-076 is a separate series, so length alone is not enough to establish interchangeability.
Notice
Before You Order — Measure Your Jet First
Remove the jet from your carb and physically measure it. If it does not dimensionally match this listing, this is not the correct jet — do not buy it.
Buyer is solely responsible for confirming the correct jet size before purchasing. Do not rely on year/make/model fitment guides — they cannot be guaranteed 100% accurate.
All jet sales are final. No returns or exchanges — no exceptions.