
This part being universal, it may require adaptations
The KEIHIN 190 Jet is designed for motorcyclists and mechanics who are fine-tuning carburetor settings to achieve clean and controlled fuel delivery. Manufactured by KEIHIN, this jet (manufacturer reference 99101-393-1900) serves as a replacement part for carburetors compatible with KEIHIN jet sizes.
Ideal for workshop operations, this jet allows for the adjustment of the air/fuel mixture richness by modifying the main flow. Whether you are looking to refine your settings for a smoother throttle response, correct a mixture that is too lean or too rich after an engine modification, replacing the jet is part of the basic technical procedures of carburetor tuning.
Complete technical specifications are not provided by the manufacturer in the available data — be sure to check compatibility with your carburetor model and machine before installation. For fitting, follow the manufacturer's recommendations or entrust the operation to a qualified mechanic to ensure precise and safe tuning.