Yes, I know China is dodgy as it gets. Rubbers perish and dissolve, bearings don’t last, and made of the finest chinesium (guaranteed pure metal LOL). I would not give them my patterns or manufacturing as this is what they always do. But quality can be good at times, just not often, and not close to Hyosung quality control. If you look on the cylinders in the photo they do say GV 250 so it is a blatant copy. Makes me wonder who Hyosung farmed the work out to. I remember a famous pen manufacturer, maybe 20 years ago had trouble, 12hrs making for the client, 12 hrs making for chinese fake. There is no recourse for copywrite or IP rights if you find your product cloned in china. The cub engines have got quite good, but still a very hit and miss purchase. But if OEM parts are unavailable then it might be an answer, but not the preferred choice. Just see how it goes, it is interesting to see that they have cloned it as Hyosung are good engineers. I would like to get my hands on one of the engines and put it through its paces. I have good experience with Hangkai outboards, they are clones of Tohatsu, Yamaha and Mercury.
The engine shown is EFI so it would need stator and flywheel change for a carby set up.