Daelim S4 50cc Service Manual - Mojo

FUEL SYSTEMACCELERATING When idling, check to see if the rotation is smoothlyand to return is normal. Turn the throttle stop screw until the 1000 rpm, andcheck the stopping of engine.If the engine is stop, adjust the pilot screw with a 1/8and repeat step and (Check by snapping slightly and check whetherRPM goes down naturally.)NOTE•If the engine cannot be adjusted by turning thepilot screw within a ¼ turn, check for other engineproblems. After the final test of the starting and driving,readjust if necessary. Assemble the carburetormaintenance cover of luggage box.PILOT SCREWTHROTTLE STOP SCREW● Assemble luggage box to carburetor maintenancecover.FUEL STRAINERFUEL COCKFUEL COCK● Disassemble luggage box.● Disconnect fuel tube A, B connected to fuel cock.● Disassemble fuel cock.● Install in the reverse order of removal.INSPECTION● Be sure to remove the diaphragms from the fuel autovalve before using compressed air the blow out ofair passages. Compressed air will damage thediaphragms or may forced them off the aluminum.FUEL COCKAIR VENTFLOATINGPRESSURELINELINKSPRINGSMALLDIAPHRAGMLARGEDIAPHRAGMNOTE•Place a clean container under the fuel tube.● Do repair after emptying gasoline in fuel tank.● Connect the fuel auto valve vacuum tube to thevacuum pump and apply vacuum. Be sure that thefuel flows out smoothly.● If the vacuum does not remain steady, it indicatesthe diaphragm is incorrectly installed or damaged.● If the vacuum remains steady, but the fuel flow isnot smooth, it indicates a clogged filter orincorrectly installed diaphragm.● If the fuel flows without the vacuum applied, thediaphragm is incorrectly installed.