Quite simple decision: it's chain driven- fergeddit!
well i am going to argue the chain driven point, look at what wombattle and co just did to WA and back, 10,000km and they didnt have to adjust the chain once on the CFMoto 650TK.
and Teelas 250 Ninja, we have not had to adjust it at all, (mind you i put a heavy duty chain on it)
so i am not judging yet.....