KYMCO DINK50 Service Manual page 30

1
. GENERAL INFORMATION
POOR PERFORMANCE (ESPECIALLY AT IDLE AND LOW SPEEDS)
Inspection/Adjustment
Check ignition timing.
Check carburetor air
screw adjustment.
Check carburetor
gasket for air leaks.
Remove spark plug
and install it into
spark plug cap to test
spark by connecting it
to engine ground.
Remove auto bystarter
connecting wire and
check if bypass fuel
line is clogged.
Connect auto bystarter
wire to battery. Wait
for 5 minutes, then
connect a hose to fuel
enriching circuit and
then blow the hose
with mouth.
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Symptom
Incorrect timing
Correct timing
Correctly adjusted Incorrectly adjusted
No air leak
Weak or inter-
Good spark
mittent spark
Not clogged
Clogged
Probable Cause



screw out)

screw in)

tightened
Air leaks

gasket

O-ring

plug




tension wire


Clogged
wire

Not clogged
Faulty CDI unit
Faulty A.C. generator
Mixture too rich (turn
Mixture too lean (turn
Carburetor not securely
Faulty intake manifold
Deformed carburetor
Faulty or fouled spark
Faulty CDI unit
Faulty A.C. generator
Faulty ignition coil
Broken or shorted high
Faulty ignition switch
Broken auto bystarter
Faulty auto bystarter
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