KYMCO AHG5 Service Manual page 254

13. Fi DIAGNOSTIC TOOL
No Complaint
4
Excessive smoke
Symptom
White smoke
Black smoke
Brown smoke
Probable Cause
Exhaust pipe clogged
Cylinder worn
Valve oil seal worn
Piston oil ring worn
Valve guides or valve stem seals worn
Too much engine oil
Air cleaner clogged
Air cleaner clogged/ no sealed/ no installed
16
DT X360