Hello I drive a Barton Cafe Racer 50ccm BJ 2020, Have it now since April 2022 (of course the warranty has expired) and suddenly the battery is no longer charged. Return: Engine just went off during a red phase at the traffic light, didn’t want to start with Kickstarter any more. Starter aid could not fix errors and also a new battery only held up to home. (Thought battery is over) But apparently not the case. Now my question(s). Where do I have to check the voltages to see where the error can lie? What information do you need for a condensing error diagnosis? Unfortunately I couldn’t find a schematic in the I-Net yet.