19. EXHAUST EMISSION CONTROL SYSTEM MOVIE SYSTEM TROUBLESHOOTING High CO at idle speed 1. Damaged or clogged reed valve 2. Damaged or clogged air injection cut-off valve 3. Clogged air cleaner Backfiring at sudden deceleration 1. Damaged reed valve (malfunction) 2. Faulty air injection cut-off valve (unable to close) 3. Carburetor incorrectly adjusted 4. Faulty air cut-off valve 5. Leaking vacuum tube Exhaust muffler noise 1. Faulty air injection cut-off valve 2. Broken vacuum tube 3. Faulty reed valve SERVICE INFORMATION GENERAL INSTRUCTIONS · During operation, be careful to avoid scalding caused by the exhaust muffler. · Note the locations of tubes for proper installation. · Replace any damaged tube with a new one. · Make sure to tighten the connector of each tube securely TOOLS · Vacuum pump SPECIFICATIONS Air injection cut-off valve actuating pressure ~~250mm/Hg~~30 liter/min. Reed valve stopper clearance4.6mm 19-2 19