KYMCO MOVIE 125 Manual page 25

1
. GENERAL INFORMATION
POOR PERFORMANCE (AT HIGH SPEED)
Inspection/Adjustment
Check ignition timing
Check valve clearance
Check fuel pump for
fuel supply
Check carburetor jets
for clogging
Check valve timing
Check valve spring
tension
1-24
Symptom
Correct timing
Correctly adjusted
Fuel flows freely
Not clogged
Correct
Not weakened
Incorrect timing
Incorrectly adjusted
Fuel flow restricted
Clogged
Incorrect
Weak spring
Probable Cause
Faulty CDI unit
Faulty pulser coil
Improperly adjusted valve
clearance
Worn valve seat
Empty fuel tank
Clogged fuel tube or filter
Clogged Fuel tank cap breather
hole
Faulty auto fuel valve
Clean and unclog
Cam timing gear aligning
marks not aligned
Faulty spring