Just thought I would share my first E bike build.
alloy frame derbi senda 50cc main frame,forks wheels and swingarm, wheels were re spoked onto 19" x 1.6 rims
motenergy me0909 motor running 48v 4kw constant with 15kw peak
4QD 300a 48v dc motor controller
4x 12v 17ah sla batteries
12T front...