Hi i am new to this forum as this is my first chinese bike. It is an 04 plate grand prix 125 scooter. What size  of battery does it need i have a 4ah 12v yuasa lying around looks a bit small. Will this do. Also where would i get left hand indicators both are broken nothing on fleabay. I was looking at how much left website and there is only 2 of these on the road. Speak about exclusive