250350cc

250350cc refers to internal-combustion engines with displacement between 250 and 350 cubic centimeters, a common class for motorcycles and other light vehicles. In motorcycles, this range spans both four-stroke designs—single- and twin-cylinder—and two-stroke designs used primarily in competition.

Design and performance: Four-stroke variants are typically compact, liquid-cooled, and feature overhead camshaft configurations, delivering a broad torque band suitable for agile handling. The two-stroke 250–350 machines emphasize high power-to-weight and simpler exhaust systems, and are usually favored in certain racing classes. The category is known for a balance between light weight and controllable power delivery, making it versatile for both competitive and trail use.

Applications and market: The 250–350cc segment is prominent in motocross, enduro, and dual-sport motorcycles, where riders value a balance between light weight and usable power. The 250-class emphasizes nimbleness, while the 350-class adds more mid-range torque for trail riding and longer events. In recent decades, four-stroke models have largely supplanted two-stroke designs in professional competition within this displacement range, due to emissions and maintenance considerations.

Notable models: Examples of 250cc four-stroke models include KTM 250 SX-F, Husqvarna FC 250, Yamaha YZ250F, and Honda CRF250R. In the 350cc category, KTM 350 SX-F and Husqvarna FC 350 are common, with other brands offering similar mid-displacement machines in their off-road and motocross lines.