None, USDs are huge. You need to use matching triple clamps. It's not the biggest job in the world, but certainly makes a big difference. The easiest thing to do is go swap out the whole front end. Wheels and brakes. I have written a guide on a proper way to do it.

@Jgb19830 i think you should get one from a dt125x i have a supermoto converted dt125re and the speedo shows around 15-20kmh over what you are going. though my speedo doesnt work anymore since the wire broke and i cant be arsed to buy a new wire

I reckon a VHSA would be a good car for that application