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The Honda XR series is a range of four-stroke off-road motorcycles that were designed in Japan but assembled all over the world. Some of the XR series came in two versions: R and L. The R version bikes were enduro machines designed for off-road competitive riding. They were fitted with knobby off-road tires and were not always street legal.
The Honda CB450 is a standard motorcycle made by Honda from 1965 to 1974 with a 444 cc (27.1 cu in) 180° DOHC straight-twin engine. Producing 45 bhp (some 100 bhp/ litre), it was Honda's first "big" motorcycle, though it did not succeed in its goal of competing directly against the larger Triumphs, Nortons, and Harley-Davidsons in the North American market at the time. [3]
These models, including the street-legal factory SuperMoto set-up, sold modestly through 2008. For 2003, ATK continued to offer variations of the 50MX, as well as a two-stroke 125, the 250 and 260 Enduros, the four-stroke 605 and 500 Enduro, and a 600 Police Edition.
This machine is built as a CRF-450R optimized for hare scramble, hard enduro, and GNCC style racing. Essentially the same as the CRF-450R except offering an electric start, larger fuel tank, and an 18-inch rear wheel as standard equipment. This bike is to bridge the gap between the more mild X-model and the closed-course race style R model.
MX racing bikes have often been used as platforms for building enduro bikes. [1] This was partially driven by the conversion of MX from 2-stroke to 4-stroke engine designs to comply with regulatory trends, as well as the development of hybrid competition races such as Enduro-X. [1] Compared to MX bikes, enduro and dual-sport bikes traditionally had a much higher proportion of 4-stroke motors.
Custom builds and engine replacements are possible to get street legal, by undergoing a single-acceptance procedure from the MOT(TÜV). This results in some custom quads popularly sporting 4-cycle motorcycle engines street legal. A common example are Yamaha Raptor 700 Conversions to a Yamaha 1000 cc engine from the early Yamaha Fazer and R1.
The Honda CRF450R is a four-stroke racing motocross motorcycle built by ... The Honda CRF450X is the enduro version of the Honda CRF450R. Notable changes. 2004: 7/8 ...
Later, in 1966, road bikes were produced as well. The first street legal bike used a Triumph Bonneville engine. Rickman initially supplied frame kits to the public, as no major British motorcycle manufacturers would sell engines separately. The frame kits were built for many engines, including Triumph twins, BSA singles and Matchless. [1]