RE: sts engine ?
rc-mall on ebay has them and all the parts, i personally would not spend the time or money re-building one. just buy a new one, takes about 3 weeks though. i'll be getting another soon for a club motor, can't beat them for $130 shipped. no carb issues, bearing issues or anything. just seal them up, break them in and run them till they die. its the buggy version of the 3.3.