5. FUEL SYSTEM ATV 300/250 Throttle Stop Screw Slow Jet Remove the main jet, needle jet holder, and needle jet. Remove the slow jet. Remove the air screw and throttle stop screw. Air Screw Main Jet Throttle Stop Screw Spring CAUTIONS! · Be careful not to damage the jets and jet holder when removing them. · Before removal, turn the throttle stop screw and air screw in and count the number of turns until they seat lightly and then make a note of this. · Do not force the screw against its seat to avoid seat damage. · Be sure to install the O-ring in the reverse order of removal. Air Screw Spring Washer O-ring Slow Jet Needle Jet Needle Jet Holder Main Jet Remove the two screws and the air cut-off valve cover. Screws 5-10