Bluefang wrote:Sorry mate i dont think your build is going to be as easy as you think, i dont doubt that you can use the alternator as a motor but i doubt it will be able to do more then push your bike at walking pace.
I pop here just to say that it is a very promising build if you start with a Gilera DNA,
but it is sure that if you start building with proper components it will be more
likely that your build will see an ending ....
I would discard altogether the alternator, that it is really not up to the task ...
and I would back up the suggestions from other forumers ....:
if you use a modified Lyen controller with irfb3077 and 18 mosfets
a C80100 motor with kV of 180 and external hall sensors... this will smooth things out
As a projection of what you could get in term of performace... if you plan to run the
c80100 at 48v and 70A ... this will give you around 3.5kW ...
putting them into the CVT could give you a very profitable edge
on the original 50cc motor performance and probably you will
approach 80kmph if everything is made really smooth ...