Which class of license permits you to drive any motorbike?

The M1 class of license is specifically designed for operators of motorbikes and allows the holder to ride any type of motorcycle, without restrictions on engine size or type of bike. This license is essential for anyone intending to ride independently on public roads, as it ensures the rider has met the necessary training and testing requirements related to motorcycle operation.

In contrast, the other classes mentioned do not pertain to motorcycles. For example, B1 typically refers to a license for certain types of light vehicles, while C1 often covers larger trucks. G1 is generally associated with novice driver's permits in specific regions that allow provisional driving under certain conditions. Therefore, the M1 license stands out as the only one that specifically permits the operation of any motorbike, making it the correct answer.