Cycle Pro mixture screw for V-twin motorcycle carburetors, a small but critical tuning component that adjusts the fuel-air ratio at idle and low throttle positions. Direct replacement or upgrade for stock mixture screws. Features Compact 2.2 in length design Lightweight at 0.02 lbs Direct replacement for stock mixture screws Specifications Brand: Cycle Pro Manufacturer Part #: 20757 Length: 2.2 in Width: 2.8 in Height: 0.65 in Weight: 0.02 lbs Fitment Fits V-twin motorcycle carburetors. Verify fitment with your carburetor model before ordering. Frequently Asked Questions What does a mixture screw do? It adjusts the fuel-air ratio at idle and low throttle positions. Turning it fine-tunes idle quality and throttle response. Will this fit my carburetor? This screw is designed for V-twin carburetors. Confirm your carb model matches before ordering — mixture screws vary by carburetor type. Is installation difficult? Mixture screw replacement is straightforward — unscrew the old one and thread in the new one. No special tools required.