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.
 
With that amount of power I'd only consider using a steel frame bike with a good reputation for being well built. I was a bit concerned about using an aluminum framed 29er bike with my 4 stroke Honda 50cc motor. I have mine rear mounted on steel supports with most of the load points located on the steel rear wheel mounts using grade 8 or better nuts and bolts. I've already destroyed 2 freewheel assemblies in less than 75 miles, while trying to be consciously careful. I have to solve that issue before I can proceed to use my MAB for its intended adventuring.
 
Thanks for the points, guys. This is just in the preliminary planning and costing phase so these points definitely help to see if it is even possible before purchasing anything. I definitely want to look at the inspection requirements in Wisconsin to see if it is even possible to register and title it. If possible, I am really leaning towards the fat tire bikes and will keep in mind the frame material and strength. I like the look of these bikes and the tires and the added grip the fat tires add to biking.

I mean so far bare bones : bike (~$250) + engine kit (~$250)...
 
I like the fat tire bikes and considered them too. I took the easy way out and selected a bike I knew I could obtain parts for in any large city and by overnight FedX. A Specialized Hard Rock 29er with front shocks, 21 speeds and dual disc brakes. I have headlight, taillight, turn signals, brake lights and high intensity flasher and horn. Here in my state it's still considered a bicycle with no registration or licensing requirements.
 
I like the fat tire bikes and considered them too. I took the easy way out and selected a bike I knew I could obtain parts for in any large city and by overnight FedX. A Specialized Hard Rock 29er with front shocks, 21 speeds and dual disc brakes. I have headlight, taillight, turn signals, brake lights and high intensity flasher and horn. Here in my state it's still considered a bicycle with no registration or licensing requirements.

The only issue with the fat tire bikes is that for standard motorized bike kit, the tires are too wide and we will need to offset the motor. I am not sure what is required of a 212cc motor but it seems for the common ones on these forums an offset is required. Dual disc brakes... god I wish I had those with my 66cc
 
I could be wrong, but it appeared he was using software to change his apparant visual speed. I do not doubt that he may be capable of 50+ mph depending on his gearing.

the wide angle lense made it appear that he was going faster than he was, not any software editing.
 
Your danger increases as the square of velocity on a bike. The 1st most dangerous speed is at zero because you'll fall over! Been there, done that, with clip ons. The only times Ive done 50 on bikes was going down big hills.
 
I was able to discern his speed according to his digital speedo and it exceeded 50 at times. :helmet:

I don't doubt it, a 212 is easy to get to 50. I'm just saying the wide FOV made it look fast.

even a 66cc is easy to get to 50 if you know what you're doing
 
Back
Top