My e-bike is not much to look at, Tranberg.
First picture is my stock, 24v 450w Currie. I later moved the SLA batteries to the frame triangle and installed my controller and excess wiring in a faux gasoline tank on the top tube. It handled so much better with the heavy lead acid batteries mounted in the frame triangle. I also put a smaller cog on the motor chain for more top speed. I have had fun tinkering with it.
