This machine is a rolling paradox. It has some very interesting engineering and some complete lapses in judgment. (Mainly committed by anyone who tries to ride the thing.)
If you look closely you will see that it has disc brakes. Impressive. In comparison with most enginized bicycles the location of the engine is nice and low which would aide in handling and stability. There is a differential which means the rear wheels will not bind when cornering. All very good.
On the other hand you are sitting right on top of a high-revving flathead engine. Hot seat would be an appropriate tag. Not to mention the potential for piston enema should anything go wrong down there.
Finally the scariest part. I may be wrong, I’ve looked at the other pictures very carefully, but it looks like it doesn’t have a centrifugal clutch. That would mean it’s direct drive. That means no sitting and idling. If the engine is running, you’re moving. Makes riding in any kind of traffic awkward.
See the full listing on eBay