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Different types of steel bar can be used, one example being EN40b.

When manufacturing a camshaft from EN40b, the camshaft will also be heat treated via gas nitriding, which changes the micro-structure of the material. These types of camshafts can be used in high-performance engines.

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It consists of a cylindrical rod running the length of the cylinder bank with a number of oblong lobes protruding from it, one for each valve.In a four-stroke engine, the valves are opened only half as often; thus, two full rotations of the crankshaft occur for each rotation of the camshaft.The timing of the camshaft can be advanced to produce better low RPM torque, or retarded for better high RPM power.With some early fuel injection systems, cams on the camshaft would operate the fuel injectors.Honda redesigned the VF750 motorcycle from chain drive to the gear drive VFR750 due to insurmountable problems with the VF750 Hi-Vo inverted chain drive.

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