01. Faultless performance
The FE 250's engine is designed to be powerful, light and compact. With all major components and shaft arrangements carefully positioned to centralise mass, its renowned outstanding performance and handling characteristics are maintained. Through innovative manufacturing processes and design, the engine only weighs 27.6 kg and delivers a smooth, torquey power delivery which makes the FE 250 accessible for both professionals and amateurs.
The cylinder head features advanced technology aimed at reducing weight and drag: from the low friction surface upon which the twin overhead camshafts rotate, to the four lightweight titanium valves - intake 32.5 mm, exhaust 26.5 mm - that are actuated by DLC (diamond like carbon) coated finger followers. This aids the engine to rev freely while maintaining smooth, efficient power throughout the rpm range.
Cylinder and piston
The cylinder is taken over from the successful FC 250 motocross model and features the same 78 mm bore. It also houses a forged bridged-box-type piston, professionally engineered from high-strength aluminium. The compression ratio of 13.8:1, in combination with the state-of-the-art cylinder as well as cylinder head gasket, provides outstanding performance and reliability.
The exhaust system is expertly designed to deliver class-leading performance at the lowest possible weight. The header pipe is designed and manufactured in two pieces, to be as compact as possible. The joining position allows it to be removed without having to take out the rear shock. Further innovation allows for a short, compact silencer without increasing noise levels. The component is crafted from lightweight aluminium and is stylishly finished off in a black coating that highlights its premium quality.