Abstract: A manual fuel supply tap with reserve position, comprising a tap body which has a cylindrical blind hole in the bottom of which a front distribution unit is mounted rotatably and hermetically, the distribution unit being provided with a stem which is associated with a manual actuation handle, a washer being fitted along the actuation stem, being provided with means which allow its relative axial sliding but not its rotation, and having at least one raised tooth which is adapted to cooperate with a corresponding notch of a fixed ring for closing the blind hole against which it is pressed by elastic means in order to determine the reserve position.

Abstract: The bicycle frame comprises a saddle tube, a steering head receiving a front fork rotatably therein, a frame top tube interconnecting top ends of the saddle tube and steering head, a front down tube interconnecting bottom ends of the saddle tube and steering head, and a rear fork assembly for supporting the rear wheel. The bottom ends of the saddle tube and front down tube are removably inserted and lockable in a crank axle block carrying the pedals. The front down tube and top tube have their front ends pivotally connected to the steering head and are provided with mutual locking means. A rear end of the top tube is connected to a sleeve positionable along the saddle tube.