Installing the shut-off valve on the fuel return line allows the fuel level in the carburetor tank to be adjusted with precision. This solution allows you to correctly calibrate carburetion during a race, in particular, if you feel the engine too “high-pitched” on the straight, you can make the mixture slightly richer. Naturally, in an ideal situation, in which carburetion has been optimised before the start and in which nothing particular happens out on the track, all this should not be necessary. You could say that the shut-off valve is an extra safety guarantee that increases reliability.

Of course. The piston can be modified in many areas, lightening it by removing material or making cuts. At Galiffa Kart, however, we recommend using standard pistons, because it is a delicate component that, it should be emphasised, can negatively impact reliability is modified incorrectly. A badly tuned piston, for example, can explode inside the cylinder even after a mere five litres of mixture, causing irreparable damage, as you can imagine.