KYMCO XCITING 500 Service Manual page 28

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
1-25
Symptom
Correct timing
Correctly adjusted
Fuel flows freely
Not clogged
Correct
Not weakened
Incorrect timing
Incorrectly adjusted
Fuel flow restricted
Clogged
Incorrect
Weak spring
XCITING 500
Probable Cause
Faulty ignition unit
Faulty A.C. generator
Improperly adjusted valve
clearance
Worn valve seat
Empty fuel tank
Clogged fuel tube or filter
Faulty fuel pump
fuel
Cracked pump vacuum
tube
Clean and unclog
Cam timing gear aligning
marks not aligned
Faulty spring