11. CARBURETOR ZX / SCOUT 50 Remove the jet needle by removing the needle clip. Check the jet needle and throttle valve for Needle Clip wear or damage. Needle Retainer Jet Needle 2nd Notch (STD) Throttle Valve Rubber Seal Carburetor Cap THROTTLE VALVE INSTALLA- TION 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 cap and throttle valve spring. Throttle Valve Spring Throttle Valve Connect the throttle cable to the throttle valve. Throttle Cable 11-4