Final Rear Ratio

[BoNewCo]

I'm converting a '79 XS1100 to electric power & need to know the final ratio in the rear hub to know how to gear it. TIA Bob

[xschop]

electric slide

3.3/1 is the stock ratio......
2.9/1 can be had with an XS750/850 Final drive
and IIRC @ 4.0/1 can be done with a V-max final drive...
That should about cover a good rear ratio spectrum....

[dbeardslee]

Bo - Welcome to the site. Electric power- what an interesting idea. Don't forget to clothes-pin some playing cards to the spokes for that realistic motor sound - can't have an XS that doesn't make some noise .

[egleaves]

I want to know how this project works out for you. I decided awhile back that if my XS ever completely craps out on me I'll convert it to electric before I get rid of it.

[Pat Kelly]

My personal opion (yeah, yeah, everybody has one) is that the shining feature of the XS is the engine with is wide, smooth, powerband. Handleing and weight are it's detractors. I would use a lighter framed bike that handles better (an RD400 with a blown motor for example).
When RC model airplanes are converted from gas to electric they substantially lighten the frame. The frame for a gas-powered vehicle has to deal with the inherent vibration of said engine that an electric motor dosen't have. This "trimming the fat" makes for less drain on the motor thus better performance (HP or runtime).
It is your project and an interesting one at that. Keep us posted with lots of photos.

[cywelchjr]

My personal opion (yeah, yeah, everybody has one) is that the shining feature of the XS is the engine with is wide, smooth, powerband. Handleing and weight are it's detractors. I would use a lighter framed bike that handles better (an RD400 with a blown motor for example).
When RC model airplanes are converted from gas to electric they substantially lighten the frame. The frame for a gas-powered vehicle has to deal with the inherent vibration of said engine that an electric motor dosen't have. This "trimming the fat" makes for less drain on the motor thus better performance (HP or runtime).
It is your project and an interesting one at that. Keep us posted with lots of photos.

But think of how many batteries you could fit into that big huge open area where the engine used to be. Make a fake mockup engine and fill it with batteries . Then again all those batteries may end up weighing more than the engine they replaced.