KYMCO MXU 450i - Troubleshooting

Troubleshooting
Problem: Spark absent or weak
Condition Remedy
1. Ignition coil defective
1. Replace ignition co il
2. Spark plug defec ti ve 2. Replace plug
3. Magneto defective 3. Replace magneto
4. ECU unit defective 4. Replace ECU unit
5. Pick-up coil def ec tive 5. Replace pi ck -up co il
Problem: Spark plug fouled with carbon
Condition Remedy
1 . Gasoline incorrect
1. Change to correct gasoline
2. Air cleaner element dirt y 2. Clean element
3. Spark plug inco rr ect (t oo co ld)
3. Replace pl ug
4. Valve seals c ra cked - missing
4. Replace seals
5. Oil rings worn - broken
5. Replace rings
Problem: Spark plug electrodes overheat or burn
Condition Remedy
1. Spark plug incorrect (too hot)
1. Re place plug
2. Engine overheats 2. Se rvice cooling system
3. Spark plug loose 3. Ti ghten plug
Problem: Magneto does not charge
Condition Remedy
1. Lead wire s/ connections shorted - l oose- open 1. Repair - replace - tighten lead wires
2. Magneto coils shorted - grounde d- open 2. Replace magneto co il s
3. Regulator/rectifier defective 3. Replace regulator/rectifi er
Problem: Magneto charges, but charging rate is below the specification
Condition Remedy
1. Lead wires shorted - ope n- loose (at term in als)
1 . Repair - tighten lead wires
2. Stator coils (magneto) grounded - ope n
2. Replace stator co il s
3. Regulator/rectifier defective 3. Replace reg ul ator/rectifi er
4. Ba ttery volt age l ow
4. Recharg in g ba tt ery
5. Cell plates (battery) defective 5. Replace ba ttery
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