Yes, it has 50cc. It all started with the Honda XR 75 in 1973:
The engine was downsized to 50cc for the Honda CB 50 in 1977:
This 50cc engine was used in several Honda models, for example the XL 50:
Or the CY 50:
Or the Honda Ape:
My Skyteam Cobra copies the Ape:
Another copy is the Zhenhua Ape:
Some say, the most beautiful 50cc-bike ever was the Honda Dream 50:
Copied as a Skyteam Ace 50: