KYMCO MX 125 - Page 28

1. GENERAL INFORMATION
1-26
MX’er SYSTEM
POOR PERFORMANCE (AT HIGH SPEED)
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
Clean and unclog
Cam timing gear aligning marks
not aligned
Faulty spring
Inspection/Adjustment Symptom
Check carburetor jets
for clogging
Check fuel pump fo
r
fuel supply
Correct ti
m
ing
Incorrect timing
Fuel flows freely
Fuel flow restricted
Correc
t
Incorrec
t
Not clogged
Clogged
Not weakened
Weak spring
Incorrectly adjusted
Correctly adjusted
Check valve clearance
Check valve spring
tension
Probable Cause
Check ignition timing
Check valve timing