KYMCO Bet & Win 125 User Manual page 23

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
1-21
Symptom
Correct timing
Correctly adjusted
Fuel flows freely
Not clogged
Correct
Not weakened
Incorrect timing
Incorrectly adjusted
Fuel flow restricted
Clogged
Incorrect
Weak spring
Bet & Win 125/150
Probable Cause
ÅFaulty CDI unit
ÇFaulty A.C. generator
ÅImproperly adjusted valve
clearance
ÇWorn valve seat
ÅEmpty fuel tank
ÇClogged fuel tube or filter
ÉFaulty fuel pump
fuel pump vacuum
ÑCracked
tube
ÅClean and unclog
ÅCam timing gear aligning
marks not aligned
ÅFaulty spring