The Honda high-performance four-stroke motorcycle is one of the most popular off-road motorcycles in the country. In this book, widely known and highly respected tuner and journalist Eric Gorr, Dirt Riders Dr. Dirt and owner of Forward Motion, takes off-road enthusiasts through the paces of performance projects for their Honda CRFs. Whether its a CRF450F, CRF250F, CRF450X, or CRF250X, your high-performance four-stroke Honda comes under Gorrs purview as he details the ins and outs of buying, maintaining, and upgrading the CRF-and doing the best off-road bike one better.