125cc+ Builds and Materials???

Hello. I have a 66cc 2-stroke motorized bike, cruise at around 20-22mph, and love it. But, in the future I think I want to have something that can go +50 mph with relative ease to keep up with traffic and a 4-stroke. There are a few options: a chinese scooter (~$800-900), a 125cc+ small motorcycle (~$3-4K), or a high power motorized bike ($???). I see a couple of the builds shown on YouTube but there doesn't seem to be a kit for the motors and every build seems to be home made. It looks like a chinese scooter is the best option but I don't want a scooter and like to explore a 125cc+ motorized bicycle build.

Anyone got any ideas or guides on how to build a bike like this? I imagine that I will have to register it as a moped or motorcycle.

 

[2old2learn]

I hate I didn't meet you when I was down working at Keesler AFB a couple winters ago. I didn't have my MAB with me but did have one of my road bikes with me and road it for miles up and down the beaches.