KYMCO XCITING 500, Service Manual

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1
. GENERAL INFORMATION
1-24
XCITING 500
POOR PERFORMANCE (ESPECIALLY AT IDLE AND LOW SPEEDS)
c
Faulty ignition unit
d
Faulty A.C. generator
c
Mixture too rich (turn screw
out)
d
Mixture too lean (turn screw
in)
c
Damaged insulator rubber
d
Carburetor not securely
tightened
e
Faulty intake manifold gasket
f
Deformed carburetor O-ring
c
Faulty or fouled spark plug
d
Faulty ignition unit
e
Faulty A.C. generator
f
Faulty ignition coil
g
Broken or shorted high
tension wire
h
Faulty ignition switch
c
Damaged air cut-off valve
diaphragm
d
Damaged air cut-off valve
spring
Remove spark plug and
install it into spark plug
cap to test spark by
connecting it to engine
ground
Inspection/Adjustment Symptom Probable Cause
Check ignition timing
Check carburetor air
cut-off valve
Check carburetor gasket
for air leaks
Check carburetor pilot
screw adjustment
Correct timing
Incorrect timing
Correctly adjusted
No air leak Air leaks
Good spark
Weak or inter-
mittent spark
Good
Faulty
Incorrectly adjusted