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Pre-Motorized Bicycle Information. Before you mount that engine to your bicycle frame, you'll want to know if the bike is ready for the engine! Ask our experts here for advice on what will perform well.

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  #11  
Old 11-30-2016, 10:17 AM
markd89 markd89 is offline
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Default Re: Folding Bicycle Advice Wanted

Thanks, gents.

I like the electric except for two factors - range and cost. I'm not sure how far I'd go on my motorized bike, but it would be good to have the option to go far. To do that with batteries is spendy.

Any more ideas, please keep them coming. I'll update the thread with what else I find...

Thanks again!
Mark
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  #12  
Old 11-30-2016, 10:52 AM
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Ludwig II Ludwig II is offline
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Default Re: Folding Bicycle Advice Wanted

Why not drive one wheel from the battery, the other the way nature intended, with an infernal rumbustion engine? Both bases covered.
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  #13  
Old 12-03-2016, 06:51 PM
markd89 markd89 is offline
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Default Re: Folding Bicycle Advice Wanted

Thanks for all the input!

I spoke with Bike Bug and Staton.

Bike Bug is a 26cc 2 stroke Homelite-engine friction system. It's $300 and looks like it would work. They told me 40 mph (!) is possible, although the website says 25-30 mph. I found it strange that no accomodation is made based on wheel size. i.e. there is one size spindle only. The spindle presses down from the engine side only. There is no bearing on the opposite side. They say they have people who have run 5000 miles with their setup. My preference is a 4 stroke but am still considering this option as the cost is low.

Staton has friction and chain drive systems including one where the engine mounts near the rear axle. The chain systems can be mounted on either side of the bike which is helpful as the engine needs to be on the outside when the bike is folded. With Staton, I would go with the GX35 Honda 4 stroke. I'm still trying to find out what the options are for gearing. It'd be nice to be able to do 25-30 mph but I suspect I would be ~20 most of the time. The geared systems are about $600, more than Bike Bug, but it's 4 stroke and you're getting a gearbox, so there's more "stuff". I'm leaning towards one of these.

Other stuff - I thought my bike was 16" as the wheels are about that size. I looked at the tires and they say 20x1.5, so I guess that 20" is the correct size. This should allow me to use one of Staton's gear systems if I want. I'm still thinking of getting another folder with more modern brakes and perhaps a little lighter weight.

Comments?

Thanks!
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  #14  
Old 12-04-2016, 11:55 PM
markd89 markd89 is offline
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Default Re: Folding Bicycle Advice Wanted

I picked up a new bike - a Giant 20" Folder. It's a few pounds lighter than the Dahon as it is made of aluminum and has more modern brakes which was my main reason for upgrading. I got a good deal from CL and will sell or give away the Dahon.

I did more looking at the engine kits and I see problems: In order for the bike to fold, the engine has to be on the right side. This has several implications:

1. Friction drive isn't going to work as all of those systems mount the engine on the left. Am I missing something?

2. Staton's axle mount isn't going to work, as it would need to be on the left. It can't be on the right as the sprocket for the pedals is on that side.

3. This sems to leave me with the only option of Staton's chain drive that mounts above the seat. I lose the rack, which would be too bad. Also it looks like the Staton system, while nicely engineered, weighs 32lbs. I'd be doubling the weight of the bike. Running with the engine that's fine, but seems annoying when pedaling. The friction drive is better in that respect as those all seem to be about half the weight.

Have I forgotten any other options?
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  #15  
Old 12-05-2016, 06:26 AM
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Ludwig II Ludwig II is offline
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Default Re: Folding Bicycle Advice Wanted

It's possible to find old European roller drivers that fit under the bottom bracket, but I don't know if the cost would put you off.



Berini (Dutch) and Velovap (France) are alternatives to the Velosolex for front wheel mounting. Berini:


Last edited by Ludwig II; 12-05-2016 at 06:29 AM.
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  #16  
Old 12-05-2016, 07:01 AM
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Ludwig II Ludwig II is offline
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Default Re: Folding Bicycle Advice Wanted

http://automotoclassicsale.com/node/6427

http://automotoclassicsale.com/node/7773

See if these will sell you an engine on it's own:

http://www.velocruz.com/home.htm

https://sites.google.com/site/velosolexamerica/

http://www.myronsmopeds.com/category/parts/solex-parts/

Last edited by Ludwig II; 12-05-2016 at 07:06 AM.
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  #17  
Old 12-05-2016, 10:10 AM
curtisfox curtisfox is offline
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Default Re: Folding Bicycle Advice Wanted

Quote:
Originally Posted by markd89 View Post
Thanks for all the input!

I spoke with Bike Bug and Staton.

Bike Bug is a 26cc 2 stroke Homelite-engine friction system. It's $300 and looks like it would work. They told me 40 mph (!) is possible, although the website says 25-30 mph. I found it strange that no accomodation is made based on wheel size. i.e. there is one size spindle only. The spindle presses down from the engine side only. There is no bearing on the opposite side. They say they have people who have run 5000 miles with their setup. My preference is a 4 stroke but am still considering this option as the cost is low.

Staton has friction and chain drive systems including one where the engine mounts near the rear axle. The chain systems can be mounted on either side of the bike which is helpful as the engine needs to be on the outside when the bike is folded. With Staton, I would go with the GX35 Honda 4 stroke. I'm still trying to find out what the options are for gearing. It'd be nice to be able to do 25-30 mph but I suspect I would be ~20 most of the time. The geared systems are about $600, more than Bike Bug, but it's 4 stroke and you're getting a gearbox, so there's more "stuff". I'm leaning towards one of these.

Other stuff - I thought my bike was 16" as the wheels are about that size. I looked at the tires and they say 20x1.5, so I guess that 20" is the correct size. This should allow me to use one of Staton's gear systems if I want. I'm still thinking of getting another folder with more modern brakes and perhaps a little lighter weight.

Comments?

Thanks!
I think Duane at Thatsdax used to sell a rear mount kit, with a 49cc 4 stroke. Wouldn't hurt to give him a call and see if he may have one yet, less money than staton..................Curt
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  #18  
Old 12-05-2016, 07:17 PM
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sbest sbest is offline
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Default Re: Folding Bicycle Advice Wanted

Quote:
Originally Posted by markd89 View Post
I picked up a new bike - a Giant 20" Folder. It's a few pounds lighter than the Dahon as it is made of aluminum ... SOME SNIPPED
Have I forgotten any other options?
If weight is important, it is hard ignore the 2 stroke motor.
There are other 2 stroke, some with better reliability than the Happy Time.

Ludwig has tons and tons of pages of wonderful ideas of how others have hooked a motor onto a bicycle.
Thanks Ludwig, inspiring. Is there nothing new under the sun? Has it all been tried before?

Remember too, the 2 stroke can be mounted in any position and even be made to rotate backwards. Stand it on its end behind the seat if it fits!

Steve
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That's a mighty noisy bike you got there, it must haul a lot of ass?
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  #19  
Old 12-05-2016, 07:50 PM
markd89 markd89 is offline
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Default Re: Folding Bicycle Advice Wanted

re: Weight. I'll zip tie a milk crate on back and ride around with some weights to see how annoying 30 lbs would be. That should give me a good idea.

Quote:
Originally Posted by curtisfox View Post
I think Duane at Thatsdax used to sell a rear mount kit, with a 49cc 4 stroke. Wouldn't hurt to give him a call and see if he may have one yet, less money than staton..................Curt
Thanks Curt. I will call Duane and talk to him too.


Quote:
Originally Posted by sbest View Post
If weight is important, it is hard ignore the 2 stroke motor.
There are other 2 stroke, some with better reliability than the Happy Time.

Remember too, the 2 stroke can be mounted in any position and even be made to rotate backwards. Stand it on its end behind the seat if it fits!

Steve
Thanks, Steve. That's interesting and I didn't know that. A little googling told me that the timing needs to be adjusted, the starting method (if it is a rope-pull) and the timing needs to be set to advance when going the "wrong" direction. Probably more adventurous of a project than I want right now, but if there's someone selling reverse rotation parts that are already dialed-in, please let me know.

P.S. What's the Happy Time?
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  #20  
Old 12-05-2016, 08:10 PM
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sbest sbest is offline
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Posts: 318
Default Re: Folding Bicycle Advice Wanted

In the early days these motors were advertized with interesting Chinese derived names like "Happy Time". Those of us who really love them also like the term "China Girl".

Reversing is a matter of cutting another keyway in the rotor, especially if starting is by bump start.

So far I have 3 folders I use for traveling in my van. 2 are electric and 1 is a Dahon 3 speed. When I am traveling, I don't need a huge range, just to get around a city or into or out of town in a country location. I have been quite pleased with the limited speed and range.

I have also mounted the full sized gas bike on the back of the van on a cheap light trunk mount bike rack for long trips. The fuel fumes are outside and the weight of the 2 stroke HT motor does not stress the rack. The fullsized bike handles speed and gravel roads better. $50 old bike and an inexpensive motor, not the end of the world if it gets stolen or damaged.

Steve
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Last edited by sbest; 12-05-2016 at 08:19 PM.
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