12. CARBURETOR VITALITY 50 Remove the jet needle by removing the needle clip. Needle Clip Check the jet needle and throttle valve for wear or damage. Needle Retainer 2nd Notch (STD) Jet Needle Throttle Valve Rubber Seal Carburetor Top THROTTLE VALVE INSTALLATION Install the jet needle on the throttle valve and secure with the needle clip. Install the rubber seal on the throttle cable and then install the carburetor top and throttle valve spring. Throttle Valve Spring Connect the throttle cable to the throttle Throttle Valve valve. Throttle Cable 12-6