4. FUEL SYSTEM ZING125 Slow Jet/Main Jet Installation Throttle Stop Screw Install the slow jet. Install the needle jet, needle jet holder and main jet. Install the throttle stop screw and pilot screw. · When installing the pilot screw, return it to the original position as noted during removal Slow Jet Main Jet Float Install the float valve, float and float pin. Float Pin FLOAT LEVEL INSPECTION Turn the carburetor upside down so that the float will go down to make the float valve contact the float valve seat. Then slowly tilt the carburetor and measure the float level with the float level gauge while the float pin just contacts with float valve. Float Level: 17mm Float Level Gauge When adjusting, carefully bend the float pin. Check the float for proper operation and then install the float chamber. 4-7