Hey @atikovi welcome to the forum Personally I wouldn't want to go faster on the Motocompacto. It's a tad too twitchy.

I think the only way to do it is to swap out the controller and battery.

 

OK. I might have to consider a scooter instead. 15 mph on a 30 or 35 mph road doesn't seem safe.

 

If you haven't yet ridden a motocompacto yet, and are looking for something to ride on a 35 mph road, you should look at an eBike. Not so much about a twitchy ride, but all about solid tires and no suspension.. imagine riding in a shopping cart going 35 mph on your road, and you will understand.