KYMCO MX'ER 50 - Page 27

1. GENERAL INFORMATION
1-26
MX’er 50
POOR PERFORMANCE (ESPECIALLY AT IDLE AND LOW SPEEDS)
Å Faulty CDI unit
Ç Faulty A.C. generator
Å Mixture too rich (turn
screw out)
Ç Mixture too lean (turn
screw in)
Å Carburetor not securely
tightened
Ç Faulty intake manifold
gasket
É Deformed carburetor
O-ring
Å Faulty or fouled spark
plug
Ç Faulty CDI unit
É Faulty A.C. generator
Ñ Faulty ignition coil
Ö Broken or shorted high
tension wire
Ü Faulty ignition switch
Å Broken auto bystarter
wire
Ç Faulty auto bystarter
Inspection/Adjustment
Symptom
Probable Cause
Clogged
Not clogged
Remove spark plug
and install it into
spark plug cap to test
spark by connecting it
to engine ground.
Check ignition timing.
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.
Remove auto bystarter
connecting wire and
check if bypass fuel
line is clogged.
Check carburetor
gasket for air leaks.
Check carburetor air
screw adjustment.
Correct timing
Incorrect timing
Correctly adjusted
Incorrectly adjusted
No air leak
Air leaks
Good spark
Weak or inter-
mittent spark
Not clogged
Clogged
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