BRAKE MASTER CYLINDER, PREFERABLY FOR A HANDLEBAR VEHICLE

A brake pump (1) comprises a pump body (4) with an inlet port (5) for a fluid and an outlet port (13) adapted to be fluidically connected to a brake caliper actuator, a piston (7) housed in a jacket (6) of the pump body (4) and movable between a rest position in which the supply port (5) and the outlet port (13) are fluidically connected via a through hole (14) in the piston (7) and a pressurization position of an actuating fluid in which the through hole (14) is fluidically disconnected from the supply port (13) via a seal (15) carried by the jacket (6) and a fluid pressure increases with the advancement of the piston (7).