I have seen this movie a long time back in the year around 1980 on a video tape. It was a martial art movie. And opening was like the hero was travelling on desert area and he eats and apple and he make a chair out of sticks. This movie have 3 kids and a cycle. Some 1 break the kids cycle and they give cycle for repair and after that the repairer add some magical changes to it. Only that i remeber.