building a motorized bicycle, need help deciding on which motor should I buy?

[butterbean]

Read the comments on the video the maker put on there


There using the standard china girl http://www.ebay.com/sch/i.html?_fro...C0.A0.H0.TRS5&_nkw=motorized+bicycle&_sacat=0

Some are using expansion chambers from what I saw and I saw some gt2 frames, I bet some of them are just using cranbrooks

I don't need to read the comments, comments still don't prove anything and the point was not whether or not a kit two stroke is capable of 35mph.

 

[butterbean]

He says the engine isn't modified to be qualified as upgraded, but I disagree. Those small changes add enough performance to not call it stock. When I say stock, I mean exactly the way it is right out of the box, which that kit is not with the mods he made.

 

[Cylon]

I bet if you bought a nice schwinn frame, a chinagirl 66cc port it, hd shiftkit and the snake exhaust then jet your carb right and it would hit 45

 

[butterbean]

I'm more focused on making the bike strong, safe and reliable than making it super fast. I still feel the 4 stroke is the more reliable choice.

 

[Cylon]

Well yeah, I only mentioned that because she seemed very interested in those other guys bikes a 4 stroke will always later longer especially when you start modding a 2 stroke like that. Then asking it to rev past 7k.

 

[butterbean]

45 is asking a bit much of any kit engine, if you go non-kit 45 is more easily attainable but the bigger engine and other parts needed will make the bike much heavier and I don't think it will do too well offroad.

 

[raindroptree]

those guys do hit 60, watch some of their other videos, they say it in the title. though I am not looking to go 60, I am just saying that 45 wouldn't be difficult to do. I can accept 40, but I need to be able to keep up with traffic if I am going to be on the road. Florida drivers are the worst. I know what you mean about a big engine not doing too well off road, I will consider it. while researching, from what I am reading, a kit engine probably isn't going to be the way to go. I might have to make this a custom bicycle. oh and my current bike is actually a steel frame 70s female schwinn, though I never considered putting an engine on it because I didn't think it would do well...

 

[butterbean]

I can't build you a bike that will do 40 or higher, because I can't guarantee its safety or ability to stop at that speed. I will build you a bike that goes 35. If you need to go faster than that, you're on your own. 40 mph is not a speed I would recommend for someone without any experience riding a motorbike to begin with. Should you choose to have me build you a bike, 35 is the fastest it will go.

 

[raindroptree]

OK. thank you for your help and advice. I appreciate it.

 

[butterbean]

The video where they are doing 60mph is not on a motorized bicycle, its on a goped which is a stand-up scooter and I can guarantee you its been heavily modified.