From a mechanical aspect, the 190 will get you there. From what I understand, the 190 will get you to 70 plus. The real question is, do YOU want to go that fast on 12 inch rims.
Tell us about that stretch of road. Is it a 2 lane Or a four lane. On a 2 lane, I wouldn’t worry too much. On a four lane, cars are going to be traveling at 65-70 mph and they will pass you!
If you check out YouTube, there are several people that ride on major roads with a Lifan KP 150 Mini Or a clone with a 190.
If I were planning on riding a clone with a 190, I would have a few mods that I deem necessary! Brakes! I would get the big brake kit with stainless steel braided brake lines. Tires! Michelin has some nice tires. Lights! Definitely an LED headlight. As cool as the integrated turn signals are, I would go with these:
They are on Amazon, look for BSK. They cost $45. MegaDan, and others, have them on their Hawk 250s and I have them on my HellCat. I’ve also seen a brake light that goes around your license plate. Not necessary, but still consider it.
Keep us posted!