200 blaster engine on a kart

There are a lot of aftermarket parts for them, I've wondered about one for a really cheap powerful Rwyb kart.
There is great potential but a lot of work needs to be done to them. The stock ports are kind of small, but there are aftermarket cylinders that look to be quite a bit better but I have only seen one in my hands so far. Yes there are a lot of parts but some of them are Chinese crap and would not be wise to race with.jmo
Find an Elsinore Honda. Turn the jug around so the carb is on the front. Just a thought on air cooled engines. Or there are plenty of Honda 250r that are air cooled.