4) THE BRAKE MASTER CYLINDER
Besides supplying the World Championship bikes with calipers, discs and pads, for years Brembo has also produced the best competition brake master cylinders. Made from an aluminium billet, the front master cylinder used by Marquez has seen a change in piston size only once.
He had an inter-axle measuring 16 mm on the Derbi, while the Suter and the Honda both have an 18 mm inter-axle and larger pistons than the Derbi. The differences in the rear master cylinder are decidedly more significant.
In the 125cc class, Marquez used a master cylinder made through casting with an external reservoir that was not integrated into the body of the master cylinder.
The size of the piston remained the same as that of the Moto2 class but the reservoir was integrated into the body of the master cylinder, which was produced from an aluminium billet. MotoGP followed suit, adding a larger piston to these two characteristics.