Vintage Motorized Bicycle Plans

[levsmith]

So i have a machining metals class right now and i just finished a hammer that we are supposed to make and the teacher said that we have to come up with the next project. So i was searching around trying to find some ideas and
somehow i got to these vintage motorized bicycle plans. I thought it was pretty interesting even though it doesn't have pedals.

http://metals.about.com/gi/dynamic/...vintageprojects.com/mini-bike/power-bike.html

i didn't really find much to make though. so if anyone has any ideas of something to make out of metal on a lathe, (preferably for a bicycle but anything will work now) i would really appreciate it. thanks

 

[oilee]

how bout a jack shaft system

 

[CalgarysFool]

The gas tanks on these bikes are pretty much all the same, and somewhat ugly.

Maybe you could fabricate a nice tank that flows with the lines of whatever bike frame you choose.

There are also plans, somewhere around here, for a springer front fork you can make, too, using springs for a screen door or something.

This could be a great project. A combination of a found object (bicycle), a few ordered parts (engine kit, sprocket, throttle assembly etc), and some metal shop fabrication (tank, forks, whatever else you can think of...).

Good luck, and keep us posted.

Brenton

 

[levsmith]

The gas tanks on these bikes are pretty much all the same, and somewhat ugly.

Maybe you could fabricate a nice tank that flows with the lines of whatever bike frame you choose.

There are also plans, somewhere around here, for a springer front fork you can make, too, using springs for a screen door or something.

This could be a great project. A combination of a found object (bicycle), a few ordered parts (engine kit, sprocket, throttle assembly etc), and some metal shop fabrication (tank, forks, whatever else you can think of...).

Good luck, and keep us posted.

Brenton

well i dont think i will be able to make the bike because i only have about 6 or 7 class periods left which is only about 24 hours of work time. thanks for the idea about the springer front forks. i may do that for the chopper but i think i will make a springer seat post first. any recommendations on what kind of spring to use for the seat post? thanks.

 

[sparky]

My suggestion is work more time after class official hours... and get 'er done. So you can...

RIDE THAT BEAUTIFUL THING!

 

[levsmith]

hey thanks for the reply but i really wasn't planning on building the bike. I could build it at home easier than at school since we have a welder and I know where all the tools are. I'll try to make it a little more clear. I have to make something on a lathe, since that is what we learned how to use in the class. I think i will make a springer seat post for the chopper since it doesn't have any suspension. That is if i can find some plans for one. Sorry if i wasn't clear enough the first time.

 

[jvirginillo]

Carb adapter?

I know very little about using a lathe or any other metalwork power tools for that matter. I have been playing around with the idea of adapting a better carb to the china bike motor and thought building an adapter would be agood project. ??

 

[levsmith]

I know very little about using a lathe or any other metalwork power tools for that matter. I have been playing around with the idea of adapting a better carb to the china bike motor and thought building an adapter would be agood project. ??

hmm sounds interesting. what kind of carb? what does your idea of the adapter look like.

 

[jvirginillo]

Carb adapter

So the idea is 'stolen' from the old aircooled VW's. There is an adapter plate that solves the problem when the 'adapted'

Here is a link

http://www.cip1.ca/PhotoGallery.asp?ProductCode=VWC%2D113%2D129%2D029%2DKIT

the new carb would attach to the adapter using the bolts and nuts (must be countersunk on the side attaching to the block. then the adapter is bolted to the block.

Problem is you 'lose' the intake runner.

The whole design on thes motors for the carb to manifold needs a rework.

A nice little Mikuni or knockoff would be nicer bolted to an aftermarket manifold. Now there is a project that I am sure is 'doable'

Wouldn't a piece of pipe with flanges welded to it do the job for our intake manifold?

As long as the runner is the same length and diameter I can't imagine it wouldn't work but maybe I am over simplifying things.

My son is getting me a Loncin carb off of a 70 CC kids ATV. I am going to try adapting it.

 

[levsmith]

if the piece would look like that, then it would be done on a mill, not a lathe, but thanks for the idea though.