Compatible with Harley Big Twin (1990-1999), Twin Cam (1999-2006), and Sportster XL 883 1200 (1988-2006), this kit serves as a perfect standard replacement, ensuring seamless compatibility and optimal performance. The screw is shaped into knurled threaded heads for easy handling. Quick Adjustment: Allows for quick idle mixture adjustment without the need for tools. Easy Installation: Easy to install, requiring the removal of the factory-installed Welsh plug. The screw is designed with knurled threaded heads for easy handling, making the installation process hassle-free. Kids Football Shirts and Kits | Premirer, England, Retro | Sports Direct Made from premium aluminum material, this mixture screw is solid and wear-resistant, ensuring durability and long-lasting use. Keihin Carburetor Parts Buy Pro Carb Rebuild Kit Mixture Screw For Harley Big Twin 1990-1999 Sportster Oil Change Kit Installation is straightforward and requires the removal of the factory-installed Welsh plug. Ensures accurate and reliable carburetor tuning. The precision tip shape ensures maximum efficiency and reliable carburetor tuning. Motoparty Pro Carb Rebuild Kit Idle Mixture Screw with Accessories For... Guarantees durability and long-lasting use. Provides all necessary components for a comprehensive rebuild. Aazon.co: Alyone Pro Carb Rebuild Kit with Air Fuel ixture Screw for Ensures perfect compatibility and optimal performance. Complete Package: Includes 1 Mixture Screw, 1 Special Spring, 1 O-ring, and 1 Washer. This kit allows for quick and effortless idle mixture adjustments without the need for tools, making carburetor tuning simple and efficient. Emissions Reduction: Precise adjustment reduces emissions and helps to minimize off-idle spit. Precision adjustment capabilities help reduce emissions and minimize off-idle spit, enhancing overall engine efficiency.