Complex sentence: Many stories circulate about his supposed wild behaviour after races and after his career was over and when he returned to racing, the Belgian federation would offer him a licence for only a day at a time until it saw how his life would progress.
Split into simpler sentences: Many stories circulate about his supposed wild behaviour after races and after his career was over. When he returned to racing, the Belgian federation would offer him a licence for only a day at a time until it saw how his life would progress.