
This part being universal, it may require adaptations
KEIHIN Idle Jet 90 (Manufacturer Part No: N424-14090) — Replacement part designed for the idle circuit of carburetors equipped with interchangeable jets. Designed by KEIHIN, this size 90 jet allows you to adjust the fuel flow at idle to achieve an appropriate air/fuel mixture for your carburetion settings.
Ideal for riders who perform fine tuning of their carburetor during a restoration, maintenance, or engine preparation, this jet installs in the idle circuit to control the richness at low RPM. It is particularly suitable for synchronization interventions or for achieving a stable idle.
Use appropriate tools and check compatibility with your carburetor model before installation. This jet is aimed at DIY enthusiasts and tuners who are concerned with precise adjustment of the idle mixture — for more consistent engine performance at low RPM.