The special vacuum control valve, in the hydraulic circuit, converts it in an I.B.S. (Integral Brake System) by means of the pistons driven and combined by the 2 calipers, front and rear; the same technology used for the maxi-scooter and maxi-moped already equipped with I.B.S. This improvement opens up the use all the way for both the progressive braking power as well as modulation.
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