KYMCO PEOPLE S 125 Service Manual page 194

18
. EXHAUST EMISSION CONTROL
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 clearance－4.6mm
18-2
PEOPLE S 4T