The Honda XR series motorcycle is a range of single cylinder four-stroke off-road motorcycles that were designed in Japan and assembled all over the world. This series of motorcycle is gradually being replaced with similar CRF series motorcycles. Some of the XR Series motorbikes came in two versions, R or L. Simply, the R version bikes were designed with off road in mind; they had very few creature comforts, and tended to come standard with knobby off-road tires fitted. The R version bikes, without modification, generally were not street legal. Conversely, the L version bikes were designed to be ridden predominantly on road, with appropriate lighting, tires and other features pertaining to road riding.
In its heyday, the XR series consisted of 10 models; however, currently only the XR 50,XR 80 and the baja-racer XR 650R and dual-sport XR 650L remain.  The rest of the XR line has been transitioned into the CRF line.