125cc Bicycle engine help?

This will be the poor soul who donated his life to science and technology:)
 

Attachments

  • image.jpeg
    image.jpeg
    317.8 KB · Views: 186
Speaking of which, just finished replacing the motor in my bike tonight, and boy does this one have a hell of a kick to it, I'm through my entire range of gears and still accelerating before I get through 1 and a half blocks. I'm probably going to have to install a smaller gear on my nuvinci, there's too much power left over that needs releasing in the form of top speed.
 
From memory I seem to remember Whizzer four strokes that have been around since the 1930-40's are 138cc's. The question is what is the dimensions and weight of synchromesh motor driven cycle engines and what about them prohibits use on a bicycle. Since the drive sprocket is set further out from the center of the frame, a fat tire bike would likely be needed. Only one style of fat tire bike rims appears to be on the market and it has thin spokes and not enough of them for the common attachment techniques of the rear sprocket. Not to mention brake problems. Installing a motor driven cycle engine on a bike would, perhaps legally in my area, allow it to rumble down the road like a Harley at 30 mph instead of screaming at you at 25 mph like a China Girl. I would expect it to be more frequently attempted in the future.
 
Back
Top