The other way round, serial carburettors can be opened with only a few millimetres of angle of rotation at the throttle grip - the right part for the Italian moments in life.
For the assembly a fixed gas pipe with Ø=22mm is required.
We have a suitable tube from Polini that fits all PK S, PK XL (not XL2), PX and T5 models (art.: 5201001).