Not much about them that isnt general....it either has a Loncin horiontal 50-125cc engine or a Vertical 125-250cc engine.........Whats the problem with yours..................?
Its either a dirty carb,,bad plug or an electrical problem..The most common to break are the stators as theyre not wound to last long.........Its a it won't start. Its a horizontal engine. I' m guessing a 70cc judging by some picture I've seen!!