I got ambitious and annoyed with my lack of progress with the e-motorcycle/bike, so I stuffed the motor in to an old, cheap ebike frame that happened to have an almost wide enough drop-out to hold it.
Was supposed to be quick and dirty, so I could just try it out. A day project. Ha!
One morning to get the bike together with the motor, swapped out front fors for disc brake ones, and wider tire mounted.
Another full morning to build a battery from my Ego packs:
Wasn't satisfied with how un-secure the battery would be just strapped in, so another full morning and most of the next building a box for it:
Then it was time to wire it up. Hid the "1500w" controller in the old battery box with all the wiring:
Managed a 5 minute ride, at which point I was already cutting in to my sleep.
Had a nice top speed:
And very useless brakes! Talk about death trap!
Fixed up the brakes the next morning. They're adequate now.
It's oodles of fun! I can accelerate up the steepest hills, and if you aren't careful with the throttle on take off, it will lift the front wheel. Oops!
I took it for a real ride yesterday. Conservative on the way out - 17.5km, and very spirited on the way home, and the battery or controller cut out one block from home when I tried to accelerate. 52V, 15ah...~22 watt-hours per KM. Very similar to my 500w electric scooters. Would assume more like 30wh/km all spirited riding. Meaning my battery is a bit too small for my needs. Better add more batteries!
@52v I'm running the motor at 1/3rd rated continuous power, a bit over half the torque it would have with my 3000w controller...I don't think I want to find out what it's like on takeoff with nearly double the amps!
I
highly recommend buying an over-sized motor and running it at a lower power, vs having a matched motor and controller of half the size...the torque is stupid fun!