want to modify BMP to make it lighter and cleaner looking

[douglasseattle]

I posted before in order to use the seatpost as mounting point (use a threadless handlebar stem)

I wish to put a dax 4.2 hp motor with the bmp kit. The steel channel is very heavy and excessively wide. Has anyone modified this kit? How much lighter did you get it?

 

[rohmell]

The only modifications that I have done is add some additional mounting holes to the channel to make it more 'universal' , so that it will fit a wider variety of bicycles.

If you add holes to reduce weight, you run the risk of weakening the channel.
I think the channels that DAX has are made from aluminum, and are lighter in weight that the BMP steel channel, maybe you could switch over to a DAX channel.