For use on Yamaha Banshee and Blaster models. Used to install a standard Mikuni idle adjuster into the carburetor body. Idle adjuster is necessary if carburetor top has been replaced with a standard Mikuni cap. Kit includes a drill bit (#6), thread tap (6 millimeter x .75 millimeter), 2 idle screws with lock nuts and instructions. Drill press or mill should be used to drill holes in the carburetor bodies.