What year is a Honda xl125 with the engine number L125SE-5051048?

The engine number L125SE-5051048 indicates that the Honda XL125 was likely produced in the early 1980s, specifically around 1980-1981. Honda typically used this format for engine numbers during that period. For a precise year, you may also want to check the vehicle identification number (VIN) or consult Honda's production records.