Okay, my sweetheart has had her 'ped for a week now. And it runs great. However, there are some things that I would like to change, for her safety. Some of them easy, some not so. Here is one of them. The Sachs 505 engine that she is running has a 6v battery attached. Aside from the usual suspects, Lights, Horn, and fuses, what else would I need to swap out to upgrade the engine from 6v to a 12v system? I want to give her brighter lighting and a louder horn.