The XR50 and XR70 kicked off pit bike fever. In 1997, the XR70R was released, intended for children who had outgrown the Z50R. The Z50R was itself replaced in year 2000 by the entirely new XR50R. Children could finally ride a mini-bike that looked exactly like its bigger XR brothers. In 2004, the series was renamed CRF. The CRF50F is still being made; the CRF70F was replaced by the more powerful CRF110F in 2013.