[Frank Lee]

I have a GL500- it is only good for 40-50mpg as a bike and certainly doesn't suffer from excess power.

Were I to consider such a project it would be easy to "imagineer" a test where you pull a trailer with the GL loaded such that the whole mess approximates what the car conversion would be. Then you can get an idea if- with stock GL gearing anyway- there is enough power. Or you could just do a hp/lb comparison with other known vehicles.

In spite of the better aero drag coefficient of the car, the frontal area is quite a lot more, not to mention the weight.

My guess is you'd end up with a very weak car with no reverse that doesn't give much better if any better at all economy.

I would strongly consider just keeping the GL as a GL and finding a lighter chain or belt drive bike to convert to EV. The GL is a runner, right, so if it ain't broke why mess with it? There must be tons of good chain drive donor bikes that are non-runners.