Honda CRF series

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The Honda CRF series is a line of four-stroke motocross motorcycles manufactured and marketed by Honda.

The CRF line was launched in 2002, both as a successor to the Honda XR series and a replacement for the two-stroke Honda CR Series. The full sized motocross bikes are equipped with liquid-cooled, single-cylinder four-stroke engines that are available from 249 cc to 449 cc. The entry-level CRF's have simple air-cooled engines, and are available from 50 cc to 230 cc. The Honda CRF450R was the first in the series, followed with the CRF250R in 2004. Further down the line, the CRF450X and CRF250X bikes emerged, both designed for mostly off-road use. They are considered among the best motocrossers of their class, and have been a leading seller since their introduction.^[1]

As of 2007, the CRF series includes the 50F, 70F, 80F, 100F, 150F, 150R, 230F, 250X, 250R 450X, and 450R. The 150F, 230F, 250X, and 450X come with electric start.