The R&D Flex Jet Remote Fuel Mixture Screw is a high-quality replacement part designed specifically for Yamaha YFZ450 owners from 2004 to 2013. Manufactured by R & D Racing Products in the United States, this product is known for its durability and performance. This screw ensures a perfect fit and allows for convenient adjustment of fuel mixture for optimal engine performance. Upgrade your Yamaha ATV with this reliable and innovative fuel mixture screw from R&D Racing Products.