Question about Xiaomi Pro 2

The motor is not the problem here anyway, it would tolerate much more. The limitations are the electronics and the battery, which do not tolerate too much current flow. As long as you only increase the maximum speed and hold back on increasing the amperage (current and thus power), there is no problem. You can find out how to do this at escooter-treff.de, for example, but you will of course lose your Swiss road permit.