I am planning to make a motor bike using this motor:
https://www.ebay.ca/itm/49cc-Comple...sh=item5458f893ec:g:PCUAAOSw3dtaqjrA#shpCntId
After doing some research i found the "transmission" is a 3.1:1 reduction. I was wondering what gear ratio i would need from the gear reduction sprocket to the back wheel to get a top speed of around 15-20 MPH with a 20 inch rim.
https://www.ebay.ca/itm/49cc-Comple...sh=item5458f893ec:g:PCUAAOSw3dtaqjrA#shpCntId
After doing some research i found the "transmission" is a 3.1:1 reduction. I was wondering what gear ratio i would need from the gear reduction sprocket to the back wheel to get a top speed of around 15-20 MPH with a 20 inch rim.
