Sym Jet Sport X R50, Service Manual

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1. General Information
1-17
C. Engine runs sluggish (especially in low speed and idling)
D. Engine runs sluggish (High speed)
Check ignition timing (using
ignition lamp)
Good spark Poor
No air sucked Air sucked
Good Poor
Normal Abnormal
Air sucked through carburetor
gasket
Adjust the air screw of
carburetor
Remove spark plug, install
spark plug into spark plug cap
and perform spark test against
engine ground
Check for fuel supplying
system in automatic fuel cup
Check if carburetor clogged
Good Poor
Check ignition timing
Normal
Abnormal
Normal Clogged
1. Incorrect ignition timing (malfunction of
CDI or AC generator)
1. Rich mixture (loosen the screw)
2. Lean mixture (tighten the screw)
1. Poor heat insulation gasket
2. Carburetor lock loose
3. Poor intake gasket
4. Poor carburetor O-ring
1. Spark plug fouled
2. Malfunction of CDI
3. Malfunction of AC generator
4. Malfunction of ignition coil
5. Open or short circuit in spark plug leads
6. Malfunction of main switch
1. Insufficient fuel in fuel tank
2. Fuel filter clogged
3. Restricted fuel tank vent
1. Malfunction of CDI
2. Malfunction of AC generator
1. Cleaning
Check and adjustment
Fault condition Probable causes
Check and adjustment
Fault condition Probable causes