Report "I have 2005 Derbi Atlantis 50 cc. Has 200 klm. Has 70 cc kit and pipe. Seems choke never stops even when bike is warmed up. Auto choke appears not to work. Removed choke and put 12.6 v DC from other battery to it. Piston gradually moved out as it should. Problem seems to be that the 12.6 volts that my bike is putting to this auto choke is AC not DC. I checked yellow wire to rear brake light and it is also 12.6 v AC not DC. Never seen anything like this. Is voltage regulator malfunctioning or is something else wrong? Thanks"