Hello, a topic that has certainly been created many times. But I couldn’t really help reading it yet. It’s a Kallio 50 with about 13,000km. Problem: The battery is no longer charged. I always build it up after driving and then charge it with a charger itself. If it’s too strong when driving, then I notice this by the fact that the scooter is stuttering or is running out shortly before. Perhaps as a preliminary remark: I had Pr obleme with my oil pump. But this is now repaired. During the repair I saw that the alternator was completely soaked with oil. I measured the voltage with connected battery and running motor: Voltage at idle: 12,1V. This does not change when turning up and full gas at all. When blinking, the voltage collapses to 10V. Voltage of the battery (not connected): 12,2V. Light works without problems. The scooter jumps even without Pro bleme an. Can I assume that the alternator has a defect in the area that is responsible for the charge?! Can I just check that? Thank you for your answers.