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17. EXHAUST EMISSION CONTROL
SYSTEM LIKE 50 2T
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/Hg30 liter/min.
Reed valve stopper clearance4.6mm
17-2