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.
 
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.
I'm thinking I'd go for a used motorcycle with not too many miles on it but perhaps 5 to 8 years old.
 
I'm thinking I'd go for a used motorcycle with not too many miles on it but perhaps 5 to 8 years old.

Oh, the problem with used motorcycles for me is that I am short 5'5" so I cannot safely ride the 300cc bikes. I would love a Honda Grom but it is $3-4k and tbh I think a motorized bike with a 125cc+ engine can perform well comparatively. And, if we put some nice painted sheet metal around the engine it might look just as nice for fractions of the price. :devilish:
 
look into something like a Honda rebel then. much smaller than a sport bike or a dual sport
 
also, a china girl is perfectly capable of 55 or more miles per hour if you're handy with a dremel or have a thousand or so dollars. or you could build with a 50cc KTM motor, which makes power on par with a predator 420cc with good tuning and an appropriate expansion chamber
 
Guys, I think I found the site and kits for it. They are definitely not on eBay. I found a few from gasbike.net, 212cc 6.5hp motors. I know the entire motorized bicycle idea is for simplicity and no registration/insurance. Having a 212cc bike is definitely beyond the legal bliss if where the motorized bike sit but I am fine with registering, getting proper motorcycle license, and insurance for that added speed and power. Looks like the kits are ~$200 range. That being said, I think this is definitely a good idea to further explore and economical too. $200 kit, $150 bike with disc breaks, and some sheet metal to create a nice style to the bike and hide engine.

http://www.gasbike.net/bicycle-motors-4-stroke.html

Here is a video of a guy riding one of the bikes. He seems to be going 50+ on it.

https://www.youtube.com/watch?v=8Zj_TyZFJIY
 
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.
 
You will need to do your home work regarding bike selection due to the speeds you anticipate driving. Heavy duty all the way.
 
You will need to do your home work regarding bike selection due to the speeds you anticipate driving. Heavy duty all the way.

Thanks for the points, m8. At the moment, I am thinking a fat tire 26" bike with disc brakes for the frame (still need to find one that fits the motor). I would like one with shock absorbers but that might not be possible and if I am not mistaken I think the lower PSI in the fat tire acts as a shock absorber.

Additionally, I like to register it but I think I need to past an inspection in Wisconsin. I am not sure what that entails or if these motors can even pass that. LOL :eek:
 
find out first what steps are necessary to make one legal.
for that size engine it may need to have lights, brake light, turn signals.
I would only consider a 212cc that has transmission.
 
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