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  #31  
Old 01-04-2015, 07:55 AM
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Default Re: 50cc GY6 on a Bicycle??

Such tidy lil power plants, think even an 80cc would be passable to the eye on a bicycle.

But man, how cool would it be if the 50 fit the horizontal X axis of wide pedals? approx. 7.5" Could easily (haha, famous last words) make a bracket to "hang" the engine below.

Forgot it probably needs to be off-set....


Gotta just get one. The dry-erase board that is my brain is full, lol.
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Last edited by Dan; 01-04-2015 at 07:58 AM.
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  #32  
Old 01-04-2015, 08:39 AM
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Default Re: 50cc GY6 on a Bicycle??

Scrolling down this page, there are long and short transmission case GY engines. Does that help?

http://www.chinese-parts-canada.com/new_motors.html
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  #33  
Old 01-04-2015, 08:54 AM
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Default Re: 50cc GY6 on a Bicycle??

Cool, Lud! TY. One pic shows the, I think brake assembly, can be removed so the engine could be close if not centered. And the shaft could be adapted to receive a sprocket. Or replaced.

2nd & 3rd pic of GY6 pictures
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  #34  
Old 01-04-2015, 09:05 AM
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Default Re: 50cc GY6 on a Bicycle??

I wonder if anyone has considered what I have seen done, but can't find the page, of chopping the back off the engine part, and running a short belt to a fixed pulley like an old Mobylette, and then a chain to the back wheel. You'd have to factor a clutch in of course, but that can be done through belt tension.
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  #35  
Old 01-04-2015, 03:46 PM
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Default Re: 50cc GY6 on a Bicycle??

Quote:
Originally Posted by Dan View Post
Cool, Lud! TY. One pic shows the, I think brake assembly, can be removed so the engine could be close if not centered. And the shaft could be adapted to receive a sprocket. Or replaced.

2nd & 3rd pic of GY6 pictures
The output shaft is splined on all of them so all that would be needed is a rear wheel to remove the splined insert from and then weld the desired sprocket on to that spline is what I would be doing I think.

Here is a pic of the little 50cc version

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  #36  
Old 01-04-2015, 03:47 PM
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Default Re: 50cc GY6 on a Bicycle??

little engines is that they have a kick start and electric
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  #37  
Old 01-04-2015, 04:29 PM
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Default Re: 50cc GY6 on a Bicycle??

Could broach it. Then sprocket would just slide on and be held by a coller.

But must be removable so could, and I think optimally, replace with a keyed shaft?
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  #38  
Old 01-04-2015, 07:20 PM
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Default Re: 50cc GY6 on a Bicycle??

My dad used to take shafts and weld them up to a larger diameter and then turn them down to desired size and then cut a keyway in it.

Yes a bit more effort but that would make for a dang good setup that would be easy to swap sprockets on, the shaft isn't hard to take out of that little gearbox, they actually make a couple different ratio gears that can be swapped out in them for eother higher or low final ratio, and the gears and shaft is actually purdy cheap.

the shaft is to small to put a keyway in I would think, but welded up and then turned down to 3/4" would probably be perfect.
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  #39  
Old 01-04-2015, 07:47 PM
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Default Re: 50cc GY6 on a Bicycle??

Thats purdy cool. Wish we lived closer map. This sounds like it is gonna be a fun project.


Swapping ratios is great. I wanna try it with 26" wheels and your right with a smaller wheel would work better but kinda restricting in choices. Well, for my bike harum any way.


but really exciting endeavor.
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  #40  
Old 01-04-2015, 08:38 PM
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Default Re: 50cc GY6 on a Bicycle??

To me, the variator drive is worth a lot of hassle to get into a bike! Even the 50cc is easily good for 50mph with the variator using engine power to best advantage.
The chain drive ends up with close to normal gearing on the four wheelers, so it's not too far off what you need. Some careful gearing research should make this a very user friendly engine choice!
And like I said, with the aftermarket hop ups and big bore kits available for these engines, you can easily get a seriously fast powerplant!
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