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Edited by Stefano Bianucci

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ITALIAN GLOSSARY

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	Rocker arm Bilanciere		Mechanical part transmitting motion from the camshaft to the valve. >>>


	Rear sprocket Corona		Device used to transmit motion to the motorcycle rear wheel. >>>


	Ram air effect Effetto ram		In order to improve cylinder filling, or in other words, to obtain high volumetric efficiency... >>>


	Reed Lamelle		Reed valves consist of a support to which several flexible flaps are fixed. >>>


	RPM limiting device Limitatore di giri		Device integral with the electronic ignition which, by preventing sparking in the plugs of one or more cylinders, makes it impossible or harder to reach excessively high engine RPM. >>>


	Return spring Molla di richiamo		In traditional timing systems, the return spring is the part that shuts the valve again after it had been opened by the cam. >>>


	R.P.M. Numero di giri		A quantity indicating the revolving speed of an element (shaft or axis). >>>


	Radial tyre Pneumatico radiale		See tyre >>>


	Radial Radiale		Generic definition to specify the positioning of two parts with respect to each other. One part is mounted "radially" with respect to another when their respective axes are perpendicular. >>>