For DRZ400S DRZ400SM DR Z 400S 400SM 2000 2024 Motocross Carburetor Air Fuel Mixture Screw 2023 2022 2021 2020 This air fuel mixture screw is designed for use with DRZ400S and DRZ400SM models from 2000 to 2024.It functions as a replacement part for the carburetor, specifically adjusting the air and fuel ratio to support proper engine performance.The screw fits directly into the carburetor housing and allows fine tuning of idle mixture settings.Constructed to match specifications, it supports in motocross and off road riding conditions.Installation requires basic mechanical tools and familiarity with carburetor systems. Compatibility Disclaimer: This is an aftermarket replacement part.Any brand names or model designations mentioned are used solely for the purpose of demonstrating compatibility.