200cc engine in a Beetle?

Considering that the old Beetle had been one of the most universal vehicles at its time, it's still a bit shocking to see one with a different engine. When it's a motorcycle engine, the surprise is even greater. But now that official spare parts are going harder to find, sometimes we might see some backyard-engineering efforts put in place to adapt some random cheap Chinese motorcycle engine. This time, a Keeway RKS 200 engine. I must admit I was somehow worried about the cooling, but it received a pair of electric fans built into the rear lid and activated by a thermostat that can be bypassed on-demand, with one fan pulling the outside air and the other exhausting the hot air away from the engine compartment. OK, not Diesel-related, but at least for me it was something unexpected.