Girls, motorcycles/cars, babies, beer,….dragons live forever but not so little boys….
See, that right there! ^^^ We grew out of them into bikes with suspension, and gearboxes that had enough power and plush to take the girl next door for a ride without her crying about the rough trail to the river.....
If I ride a minibike these days, it's got to have big ass balloon tires with low pressure, or shocks and forks, or both. Rigid? Heck nah, only at the track or truck meets that allow them.
As far as younguns riding minis, Chy Knee has that covered, can't compete with the cost of them. Sadly. Your business in the US would be taxed and regulated to death, by the Chy Knee owned gumment we live in now.