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| Motorized Bicycle General Discussion Topics on bicycle engine kits, help articles, repair and modifications for your motorized bicycles |
Engine Vibration
Discussion at Motorized Bicycle Engine Kit Forum in the Motorized Bicycle General Discussion forum. I searched but didn't find any info.
Is the a way to balance the (80cc?) engine (crank,rod and ...  | | 
10-19-2008, 10:17 PM
|  | Motorized Bicycle Elite Member | | Join Date: Sep 2008 Location: Fl.
Posts: 263
| |  Engine Vibration
I searched but didn't find any info.
Is the a way to balance the (80cc?) engine (crank,rod and piston)
Does anyone know a shop that can do this? Mine vibrates so bad after about 3-4 k that I believe it looses 1/2 of it's potential performance. |
10-20-2008, 01:14 AM
|  | Motorized Bicycle Elite Member | | Join Date: Jul 2008 Location: North California Coast
Posts: 144
| | Re: Engine Vibration
Not without some machine work on the flywheels.
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10-20-2008, 01:31 AM
| | Motorized Bicycle Elite Member | | Join Date: Jul 2008 Location: North California Coast
Posts: 144
| | Re: Engine Vibration
I had this idea for a way to balance the flywheel.
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Anyone who has never made a mistake has never tried anything new. - Albert Einstein
I used to say that politics was the second-oldest profession. I have come to know that it bears a gross similarity to the first. - Ronald Reagan
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10-21-2008, 12:02 PM
| | Motorized Bicycle Elite Member | | Join Date: Sep 2008 Location: Fl.
Posts: 263
| | Re: Engine Vibration
Quote:
Originally Posted by jburr36  I had this idea for a way to balance the flywheel. | That looks good.
I was thinking of a machine shop that does balancing on race motors? Cutting off weight and adding heavy metals like bigger cranks. |
10-21-2008, 12:06 PM
|  | Motorized Bicycle Elite Member | | Join Date: Sep 2008 Location: Lima, Peru
Posts: 123
| | Re: Engine Vibration
Good idea
I will visit a friend who has a big machine shop, has a dynamic balancer machine
He has experience with all types of racing engines, must know about single cylinder balancing
Peace |
10-21-2008, 12:13 PM
| | Motorized Bicycle Elite Member | | Join Date: Feb 2008
Posts: 413
| | Re: Engine Vibration
For Starters, there is no such thing as an 80cc. As for vibration, I have never had vibration that was objectionable. My 2 choppers I built are border line. That is because of the low gearing. Which means this.. If you lower the size of your rear sprocket, and make sure your mounts are tight, you should be fine with vibrations. Also.. Wearing good gloves will also help. Enjoy the ride... |
10-21-2008, 03:34 PM
|  | Godfather of Motorized Bicycles | | Join Date: Jan 2008 Location: Ashtabula county, Ohio
Posts: 7,081
| | Re: Engine Vibration
...and a gel seat....and using lead sheet to mount the engine.
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If it ain't broke, and you mess with it long enough, it will be. |
10-21-2008, 04:21 PM
| | Motorized Bicycle Newbie | | Join Date: Sep 2008
Posts: 17
| | Re: Engine Vibration
what about adding rubber under the mounts like chainsaws have to reduce vibration
i used the rubber car exhaust hangers and cut them to fit my mounting brackets, hardly feel the engine running, smooth as silk. |
10-21-2008, 04:42 PM
| | Motorized Bicycle Elite Member | | Join Date: Sep 2008 Location: Lima, Peru
Posts: 123
| | Re: Engine Vibration
Quote:
Originally Posted by amealnet i used the rubber car exhaust hangers and cut them to fit my mounting brackets, hardly feel the engine running, smooth as silk. | Interesting
Any pics? |
10-22-2008, 07:38 AM
| | Godfather of Motorized Bicycles | | Join Date: Jan 2008 Location: Ashtabula county, Ohio
Posts: 7,081
| | Re: Engine Vibration
Yes, pictures? If you can rubber mount and get the engine to stay still enough to keep the chain on, you are doing well. I have found that the lead absorbs the vibration better than the rubber I tried (inner tube). The lead worked well enough, I never tried anything after that.
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