that had powered the XR200R before 1984 and variations of the 2 valve engine continued to power the XR200R until the model was dropped altogether.The 1991 model was the best performance wise. Brazilian versions of the XR 200R were introduced in 1992 and remained on production until 2001 for the domestic market and at least until 2015 for export, always fitted with the 2-valve engine, electric start and front disc brake. At least in Australia, the Brazilian-made model was rebadged CTX200 and fitted with a "cheater sprocket" to get an overall lower gear ratio more suitable to the needs of agricultural operators and was not roadworthy as supplied. XR 230/250R The XR250R was introduced pre 1981 and was originally equipped with a variation of the engine that had powered the XL250S since 1978. For 1983 the model was dropped from Honda's line-up, but came back in 1984 with a completely new engine dubbed the "Radial Four Valve Chamber" (RFVC) engine. The original RFVC engine had a bore and stroke of , but in 1986 this was changed to . 1986 also saw the adoption of a large, single carburetor rather than the dual progressively opening carburetors of the 84-85 models. In 1996 the engine of the XR 250R, the mainstay of the XR range, was updated and now produced at 8100 rpm. Changes included a new crankcase with better engine mounts (which incorporated the swingarm pivot) for a stiffer chassis, smaller exhaust valves to address a problem with cracking cylinder heads, and an improved automatic decompressor for easier starting. Although the XR250R was always quite heavy compared to its 2 stroke competition and both front and rear suspension were rather basic, it proved reliable and likable and was successful as an entry-level off-road machine. The XR250R was discontinued after 2004. US XR 250L This street version of the XR250R was built to conform to USA Department of Transportation regulations for street legal motorcycles, but was sold worldwide. It had road legal lights and tires, a steel fuel tank, keyed ignition/steering lock, lower seat height and other minor changes. Some heavier, it had reduced off-road ability. It shared the XR250R's RFVC engine, but with a different carburetor and smaller exhaust headers to meet emissions requirements. It was manufactured from 1991-2007. There was a Brazilian equivalent named XR 250 Tornado made from 2001 to 2009 (until 2012 for export) for the local