What battery model is used for a 125cc motorcycle?
2 Answers
125cc motorcycles use the battery model 12N7-4A. Introduction: A battery, also known as an accumulator, is primarily made of lead and its oxides, with a sulfuric acid solution as the electrolyte. Its working principle involves converting chemical energy into electrical energy. Classification: There are three types: standard batteries, dry-charged batteries, and maintenance-free batteries. Standard batteries have plates composed of lead and lead oxides, with an aqueous sulfuric acid solution as the electrolyte. Dry-charged batteries are characterized by their negative plates' high electricity storage capacity, allowing them to retain charge for up to two years in a completely dry state. They only require the addition of electrolyte and can be used after 20-30 minutes. Maintenance-free batteries, due to their structural advantages, consume very little electrolyte and generally do not require distilled water replenishment during their lifespan.
As someone who frequently repairs motorcycles, I've noticed that 125cc motorcycles mostly use lead-acid batteries like the YUASA YTX4L-BS or YTX7L-BS, depending on the brand. For instance, Yamaha or Honda have their own specifications. Every time a bike comes in for maintenance, I remind the owner to first check the manual or the battery label—typically, the capacity is around 4Ah with a voltage of 12V. Using the wrong model can lead to slow starts or even short circuits, so I recommend regularly checking the battery terminals for oxidation and cleaning them with a cotton cloth to extend their lifespan. If the battery is left unused for a long time, it may discharge, so it's best to connect it to a charger for maintenance. Upgrading to a maintenance-free type is more convenient and costs around 100 yuan—just don’t skimp and buy counterfeit products to avoid getting stranded on the road.
