On the other hand... A 4t burns less fuel per mile therefore has a longer range between fill ups. Doesn't polute as bad. Almost never fouls a spark plug. And you don't need to do a top-end rebuilt as often, if ever. Doesn't make that annoying "ringy dingy" sound.
Ive noticed 4t and 2t kymcos last just as long as each other as long as youre leaving it all stock. I have 23 k kilometers on one kymco zx50, Ive put 21k of them myself. Ive seen a lot of people replacing their 4t top ends after a blow out on here pretty often, same goes for 2t I know.
Gas mileage wise a 4t can get you better gas mileage but unfortunately it will also take you 25% longer to get to where youre going if you dont get ran down by moving traffic.
To me, Its the difference of buying a turbo charged car and a non turbo. With a turbo car (2t) you already have everything there to make it go fast just have to tune all the parts to your liking, with a 4t you have to change a lot to get even a fraction of the performance of the turbo car. I can do a cylinder swap safely and effectively in a hour on a 2t and 2 hours on a 4t, granted a I have a little bit of experience, 4t have a lot more moving parts than a 2t so theres a lot more to make sure isnt wrong.
Also theres a lot of back woods hill billys who have built some serious 2 strokes, if someone who cant read or write properly can build it then I have faith that most people can. And it always amazes me when people make 2t out to be a complicated machine when theres only 3 moving parts that make up the internals of a 2t engine.
You can do it blue!