From what I read, these Tao Tao 4 stroke 110 / 125 cc motors have a lot of electrical problems. I bought a whole kit of electrical components, (reg, solenoid, ign switch, coil, cdi box, pickup and coils, wiring harness, etc) for $36, just to have them, (cheap insurance). Mine is charging at about 13.5V. Got a 49cc and this one for the Grandkids. Fair enough designs, just typical Chinese stuff that needs to be gone through.