
Keihin OEM FCR-MX Leak Jet N424-52
Details
- MPN
- Manufacturer
- Keihin
- Subtype
- Leak Jet
- Condition
- New
- Carb Model
- FCR-MX
- Spec Type
- Stock
- Use Case
- Off-road
- Fits Models
Kawasaki
- Kawasaki KLX450R
2008–2009
- Kawasaki KX250F
2003–2010
- Kawasaki KX450F
2006–2008
- Kawasaki KLX450R
Suzuki
- Suzuki RM-Z250
2003–2008
- Suzuki RM-Z450
2005–2007
- Suzuki RM-Z250
Yamaha
- Yamaha WR250F
2001–2008
- Yamaha WR250F
Description
Keihin N424-52 brass leak jet for the FCR-MX accelerator-pump circuit. It controls how much pump fuel returns to the float bowl. A smaller jet reduces bleed-back for a larger, longer fuel squirt; a larger jet increases bleed-back for a smaller, shorter squirt.
M4 × 0.7 thread, 8.5 mm overall length. Select the jet size required for your carburetor calibration.
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.




