I made this video to show the internal workings of a Honda CT90 engine. I built the engine using CT90 cases that I had machined so the the engine would still function mechanically and so that you would be able to see all of the components operating from the outside.
This video is a part of a post I did at my CT90 blog that is focused on the repair and restoration of Honda CT90 and CT200 motorcycles.
My blog can be viewed at: https://ct90restoration.blogspot.com