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KEIHIN Main Jet 150 — Manufacturer part number: N424-27150
Main jet number 150 by KEIHIN, designed for fine-tuning the fuel flow on carburetors. This spare part is intended for riders who are adjusting the air/fuel mixture: the main jet primarily affects full throttle and mid to high RPM ranges.
Function: controls the fuel flow at full load, impacting the mixture richness and throttle response.
When to replace: if you notice a lack of power at high RPM, very black spark plugs, or if you modify intake/exhaust and need to adjust the jets.
Practical advice: carefully clean the jet holder, check for impurities, and adjust the jet according to altitude, engine modifications, or the filter.
Compatibility: KEIHIN jet — check the carburetor model before installation.
This product is intended for mechanical adjustments and maintenance. Replace the jet with care or have it installed by a specialist if you are not comfortable with carburetor adjustments: proper tuning is key to clean operation and consistent engine response.
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