
This part being universal, it may require adaptations
The KEIHIN 120 idle jet (manufacturer reference N424-35120) is an adjustment part designed for KEIHIN carburetors. It is intended to fine-tune the air/fuel mixture calibration at idle, allowing for adjustments to the richness during startup and at low RPMs, which are critical zones for engine stability and immediate throttle response.
Practical for motorcyclists performing fine maintenance or carburetor tuning, this jet fits compatible KEIHIN series and is part of the regular tuning and maintenance routine. It meets the precision needs during idle adjustments, without unverifiable technical promises.
Usage tips: check compatibility with your carburetor before installation, clean the seat and passage of the jet thoroughly to avoid clogging, and make gradual adjustments to find the ideal richness at idle. For installation, prefer a methodical approach or entrust it to a professional if you are not comfortable with carburetor tuning.