I have been working on my conversion of a little go kart of mine. Formerly it had a 100cc 2-stroke engine, direct drive (you had to push start it. It went well but I always wanted to convert it to electric.
Initially I just want to match the performance of the original motor. Top speed was ~85km/h, there was also a minimum otherwise you would stall... Acceleration was great from about 30 - 70 km/h.
I bought a Motenergy ME0201013001 from EV works - $450 - http://www.evworks.com.au/index.php?pro ... 0201013001
I designed and had made a motor mount.
I purchased a 24 Mosfet Controller XJC8b116 kit. Built the controller with 4110 fets. Current limit is at 200A batt, 400A phase at the moment.
I have been slowly putting it all together over the last 6 months. It is currently at my parents farm so I only get to work on it when I make the 2 hour trek. I have put larger, treaded wheels on it at the moment for gravel driving. I also mounted a new larger seat, the previous one was kids size I couldnt fit in properly. Go kart has a Haase chassis.
Top speed so far is 77km/h. I haven't done any power measuring as I only have a turnigy watt meter at the moment. Buying a CA soon.
Things to do: Chain guard, Controller cooling (fans), move current accelerator and use existing cable and spring pedals, replace brake master cylinder (keeps needing to be bled), mount batteries in sidepods and re attach them, mount controller behind seat..
My other ride:viewtopic.php?f=6&t=33659
Video test spin up (after I had modified the throttle, I soldered a trim pot in the -ve line to adjust the bottom end) This is nowhere near full throttle.
Very happy with it so far.