
This part being universal, it may require adaptations
KEIHIN Main Jet 140 – Manufacturer reference: 99101-357-1400
Original KEIHIN main jet, size 140. Designed for carburetion adjustment, this main jet is used as a replacement on compatible KEIHIN carburetors to adjust the amount of fuel delivered at wide open throttle. This part falls under the "jet" category and is aimed at motorcyclists looking for a reliable replacement solution for the fuel circuit.
The main jet affects the mixture at high RPM: by changing the size of the jet (here 140), the fuel flow at full throttle is adjusted. Ideal for carburetor tuning and maintenance operations, it should be chosen based on manufacturer recommendations and engine operating conditions.
Usage advice: check compatibility with your KEIHIN carburetor model before installation and, if in doubt, have the adjustment done by a professional to avoid any risk of incorrect engine tuning. Reference image provided for visual identification.