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DIY Home Built Motorized Bicycle (non kit) Post all about your home built rides here. Weedwacker motors, lawn mower engines ect. This area is for non kit builds

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  #21  
Old 10-12-2014, 04:03 AM
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Ludwig II Ludwig II is offline
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Default Re: Thread for alternative engines

All is not lost. Surplus metal is easy enough to cut away (measure twice, cut once of course), and if you have a lathe or know someone who can do it for you, a tapered sprocket carrier is comparatively simple to arrange. Add to this that the generator part is redundant, so why not just cut the taper off it and use that?

MM, do you have a picture of the end of the generator?

Just thinking about it, that casing would make a good sprocket cover and also offer substantial mounting points.

Last edited by Ludwig II; 10-12-2014 at 05:07 AM.
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  #22  
Old 10-12-2014, 08:34 AM
mat_man mat_man is offline
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Default Re: Thread for alternative engines

Quote:
Originally Posted by Ludwig II View Post

MM, do you have a picture of the end of the generator?
CRANK SHAFT ASSEMBLY FITS YAMAHA ET950 ET650 1E45F GENERATOR
http://www.aliexpress.com/store/prod...750719188.html

Re: Another HF Engine To Consider
http://motorbicycling.com/showpost.p...7&postcount=13

One option might be to remove the stationary windings and make minor cuts to
housing to allow a friction drive to run on the rotating windings (or magnets?).
Not sure of the diameter of the rotating windings.

I have seen other friction drives that have used old electric motor armatures and bearings
as spindles.

Last edited by mat_man; 10-12-2014 at 11:41 AM.
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  #23  
Old 10-12-2014, 11:35 AM
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Ludwig II Ludwig II is offline
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Default Re: Thread for alternative engines

The ongoing career of motorised bike builder takes a mysterious turn for me now. I am promised the bones of an old rotovator. I didn't know how old, until I was informed that it's more modern replacement was from the 60s.

On the plus side, it might be a British engine like a Villiers or BSA, on the minus side, it might run on TVO, assuming it runs at all. The next question is, how big is it? 98cc,up to 150 ok, but it could be anything up to a 636cc Douglas single.

To be investigated.
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  #24  
Old 10-12-2014, 12:27 PM
mat_man mat_man is offline
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Default Re: Thread for alternative engines

Minimum modifications, Maximum optionality?

Hardly Rideable Owners Club
http://www.hardlyrideable.co.uk/album%20page7.htm
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File Type: jpg rotovator.jpg (106.9 KB, 169 views)
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  #25  
Old 10-12-2014, 01:35 PM
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Ludwig II Ludwig II is offline
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Default Re: Thread for alternative engines

I like it.

A quick search reveals the thing I'm getting is more likely to be a small engine, except for the fact it's in agricultural land, so it might not be. Basically, 98cc-250cc 2 stroke, or 98cc - 1100cc V twin 4 stroke.
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  #26  
Old 10-12-2014, 03:11 PM
FFV8 FFV8 is offline
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Default Re: Thread for alternative engines

Hmmm a 100lb Douglas single. I can think of a use or 3 for that.

Keep us posted!

B
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  #27  
Old 10-12-2014, 04:47 PM
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Ludwig II Ludwig II is offline
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Default Re: Thread for alternative engines

It may end in disappointment, but right now I'm like a kid at Christmas. If the engine is the right size to go into the big old bicycle, I'll see about the feasibility of actually making a touring Cree Autocycle, as in my original pictorial musings years ago.
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  #28  
Old 10-12-2014, 07:16 PM
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dirtwarrior dirtwarrior is offline
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Default Re: Thread for alternative engines

I am considering a tanaka 3 hp outboard engine
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  #29  
Old 10-12-2014, 09:20 PM
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Intrepid Wheelwoman Intrepid Wheelwoman is offline
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Default Re: Thread for alternative engines

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Originally Posted by dirtwarrior View Post
I am considering a tanaka 3 hp outboard engine
Oooooooo that should be interesting
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  #30  
Old 10-12-2014, 09:44 PM
FFV8 FFV8 is offline
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Default Re: Thread for alternative engines

Outboard on a bike? i have seen this one in person...



The rest of the pics are here:
http://justacarguy.blogspot.com/2013...d-powered.html

Elaborate job, whoever did it.
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