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2. GENERAL INFORMATION ZX / SCOUT 50
POOR PERFORMANCE (ESPECIALLY AT IDLE AND LOW SPEEDS)
Inspection/Adjustment Symptom Probable Cause
Check ignition timing.
Correct timing Incorrect timing Faulty CDI unit
Faulty A.C. generator
Check carburetor air
screw adjustment.
Mixture too rich (turn screw
Correctly adjusted Incorrectly adjusted out)
Mixture too lean (turn screw
in)
Check carburetor gasket
for air leaks.
Carburetor not securely
No air leak Air leaks tightened
Faulty intake manifold gasket
Remove spark plug and Deformed carburetor O-ring
install it into spark plug
cap to test spark by
connecting it to engine
ground. Faulty or fouled spark plug
Faulty CDI unit
Good spark Weak or inter- Faulty A.C. generator
mittent spark Faulty ignition coil
Broken or shorted high
Remove auto bystarter tension wire
connecting wire and Faulty ignition switch
check if bypass fuel
line is clogged.
Broken auto bystarter wire
Not clogged Clogged
Connect auto bystarter Faulty auto bystarter
wire to battery. Wait for
5 minutes, then connect
a hose to fuel enriching
circuit and then blow
the hose with mouth.
Clogged Not clogged
2-20