1 / 4Keihin Pilot Jet N424-21
Details
- MPN
- Manufacturer
- Keihin
- Subtype
- Pilot Jet
- Condition
- New
- Spec Type
- Stock
- Use Case
- Street
- Fits Models
Honda
- Honda CB750
2000–2003
- Honda CRF150R
2007–2009
- Honda CRF450R
2002–2006
- Honda RS125 Racer
1988–2004
- Honda RS250 Racer
1993–2008
- Honda CB750
KTM
- KTM 250 EXC-F
2007–2016
- KTM 250 EXC-F
Description
The Keihin N424-21 pilot jet meters fuel at idle and low throttle in compatible carburetors, including FCR and FCR-MX applications. Its 28 mm length distinguishes it from the shorter N424-26 and N424-330 pilot-jet families.
The standard FCR-MX37 and FCR-MX39 configurations use #45, while the standard FCR-MX41 uses #48. These are configuration-specific sizes, not a recommendation for every carburetor using N424-21. Select the size required for your installed carburetor.
- FCR-MX exploded view reference: 28
- PWK28 pilot/slow jet exploded view reference: 10
- Standard PWK33, PWK35, PWK38 and PWK39 pilot/slow jet exploded view reference: 10
- PWK35 and PWK38 Quad Vent / Air Striker, and PWK36 Quad Vent pilot/slow jet exploded view reference: 10
Diagrams are for identification. Other illustrated parts are not included.
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.
