I bought my 2006 zx636 from someone, when I got it it had a new stator, rectifier and battery. I left a light on my bike and the battery died. So I charged it (not connected to the bike) on my car. I now now I wasn't supposed to do that but when I used it on my bike it worked and then died so I charged it one more time and was wondering why it died again. I then went and bought. A new battery because I didn't know I needed a trickle charger. But when I put the new battery on it will only starts. Few times before it's dead. I don't thinks it's the stator or recifier because their new. Does anyone know what it could be?