I've had the same problem for years. The scooter has been in for repair 2 or 3 times and each time the plug was replaced. Fine for a few weeks then back to square one! Replaced the carb too but that didn't cure it. It's currently sworn as I gave up - such a shame cause it's a nice ride. If anyone can solve this problem then let us know - PLEASE.
Ian, March 2011
