Motorcycle Carburetor Air Fuel Mixture Screw For FCR MX CRF YZF WR KXF KLX RMZ Motorcycles Atv Dirt Bike Carb This carburetor air fuel mixture screw is designed for use with FCR, MX, CRF, YZF, WR, KXF, KLX, and RMZ model motorcycles and ATVs.Made from aluminum , it offers strength and a lightweight construction with a net weight of 3.5 grams.The screw is available in red, blue, and black, allowing for visual customization and easy identification during tuning. Engineered for compatibility across a range of dirt bikes and off-road vehicles, this mixture screw supports precise adjustment of the air-fuel ratio to help maintain consistent engine performance.Its design allows for straightforward installation without the need for special tools, making it accessible for routine maintenance or replacement. The compact and build dependable function under regular riding conditions.Each unit is designed to meet standard specifications for carburetor components, providing a functional solution for carburetor setup and calibration. Compatibility Disclaimer: This is an aftermarket replacement part.Any brand names or model designations mentioned are used solely for the purpose of demonstrating compatibility.