
This part being universal, it may require adaptations
KEIHIN Idle Jet 55 — Manufacturer part number: N424-21055
Original KEIHIN part designed for fine-tuning carburation, this idle jet size 55 allows you to precisely control the fuel flow at idle. Designed for mechanics enthusiasts and workshop professionals, it is aimed at riders who care about a stable idle and a controlled air-fuel mixture during low RPM phases.
This jet is used during interventions on the carburetor to correct an irregular idle or to adapt the carburation according to altitude, temperature, or engine settings. For reliable diagnostics, also check the condition of the needle, slide, and float circuits. In case of doubt about compatibility, consult the manufacturer's documentation or your usual mechanic before installation.