а все понял :)
Service Honda’s first step was to choose the engine. The 2007 model was the final CR250 two-stroke engine produced by Honda. It would be logical to assume that they would use the most modern engine, but most devout CR250 aficionados don’t believe that Honda got the bugs worked out of their quirky, albeit high tech, case reed, RC, electronic power valve-equipped 2007 engine. When Service Honda compared the 2001 engine to the updated case-reed engine, they found that peak horsepower was about the same, but the 2001 had a much broader, more usable powerband on the track. The less-complex, faster engine was the obvious pick.