Inspection Items - Sym GTS 250 Service Manual

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18. Emission Control System

Inspection Items

Secondary air injection system
1. Visual inspect the reed valve, air injection cut valve, and secondary air filter as well as hoses for
damage.
2. Leaking check.
3. Warm-up running check.
Fuel Evaporation Control System
1. Visual inspect the carbon canister and hoses for damage.
2. Leaking check.
3. Function test of the purge control solenoid.
Catalytic converter
1. Check if exhaust gas content is within standard.
2. Remove the exhaust pipe and shake it gently for noise.
Fuel Supply System
1. Clean the air filter.
2. Check the air filter.
3. Clean the carburetor fuel jet, air jet and all circuit with air gun or specified solvent.
4. Check the float level of carburetor.
5. Adjust CO/HC values at idling. (engine rpm must be within specification)
Ignition system
1. Spark plug check and replacement.
2. Ignition coil check and replacement.
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