My DT75 isn't idling well and falls on its face under throttle. My mechanic has thrown parts at it with no resolution. Right now he's working on the carbs but I've got a unconnected wire that troubles me since the middle cylinder doesn't seem to be firing. Its a Red wire with a Yellow stripe coming from the Magneto and going to the Rectifier\Regulator per engine wiring diagram plate on the motor. but its the only wire in the motor that's not connected. I'll attempt to attach a few pics for reference. Any help would be appreciated. Thx