2005 Honda XR 250 Tornado

And still in production as the CRF50

Only, there was an XR185 sold in some markets. Introduced

Until 1984. The XR200 had a modestly enlarged ohc 2-valve 6-speed air-cooled engine with kick-start only.

And produced together with the XR200 for a few years, the Honda XR 200R had the same 195 cc (11.9 cu in) engine of its predecessor, the XR200. This oversquare two-valve engine had a 10:1 compression ratio.

The model was dropped from Honda's line-up, but came back And discontinued after the 1985 model year. The 1983 and 1984 models were wet sump engines with a bore and stroke of 84 mm × 61.3 mm (3.31 in × 2.41 in) and a displacement of 339 cc (20.7 cu in).

-85 model years, the XR200R had a smaller version of the same 4 valve RFVC engine as the other XRs in the line up. The 200cc RFVC engine shared many parts with the 250cc RFVC engine. With a completely new engine dubbed the "Radial Four Valve Chamber" (RFVC) engine. The original 250 cc (15 cu in) RFVC engine had a bore and stroke of 75 mm × 56.5 mm (2.95 in × 2.22 in), but

Four years after the XR100 was brought to market. A major difference between the two was a major rear suspension upgrade to a more race-like single coil-over design (monoshock) and a new swingarm over the traditional dual real coil-over systems on the XR100.

Honda reverted to the 2 valve engine 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. This was changed to 73 mm × 59.5 mm (2.87 in × 2.34 in). 1986 also saw the adoption of a large, single carburetor rather than the dual progressively opening carburetors of the 84-85 models.

/94 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…

The engine of the XR 250R, the mainstay of the XR range, was updated and now produced 19 hp (14 kW) 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 cylinde…

. Originally it was called the Z-50, then Trail-50, the XR 50, CRF 50, and the mini dirt bike.