BY BETTER BT125-20 STARTS AND TICKS OVER BUT AS SOON AS YOU THROTTLE IT STARTS CUTTING OUT AND IT HAS WHITE SMOKE. CDI UNIT ,COIL, HT LEAD,AND HT CAP HAVE BEEN REPLACED ALSO FUEL FILTER ON THE FUEL TAP HAS BEEN CLEANED WHAT NEXT?
I have just resolved the same problem, the bike has been stood some time and the fuel in the float chamber had dried out and left a coating on everything. Cleaned float chamber, main and idle jets, fuel inlet. All working fine now.
John, July 2009
try cleaning the carb or replacing it sound like a carb problem to me
