Hi i bought a brand new sportcity 125. From the very first moment the battery is loosing power after few kms of driving. I changed the voltregulator but no luck. I noticy that my scooter has a 10ah battery but in specs is something about 12ah. How can i check the lightmachine? There are 3 yellow cables from lightmachine to regulator. There is a 13,5 volt power between two of them. Is this correct?.