Master brake cylinder -PIAGGIO Heng Tong- rhs - Vespa GT 250 (ZAPM45102), Vespa GTV 125 (ZAPM31301), Vespa GTV 250 (ZAPM45102), Vespa GTV 300 (ZAPM45201)

Here is an overview of the force applied to the brake piston when combining different calipers and pump combinations.

In general, if the slave pistons are enlarged while the encoder pistons remain the same, there is always an increase in the braking force, although the lever travel is longer.
Conversely, if a brake pump with a larger piston but the same caliper is installed, a decrease in the force applied to the brake pistons is to be assumed, although the lever travel is smaller. Thus the brake becomes more direct, but requires more lever force for the same brake performance.