Can you use a dead generators engine for a Go Kart or other purpose, find out what you're up against. Also how to remove the generator Rotor. Then watch me grind the crankshaft down without removing it from the engine: https://youtu.be/ENcxCRQNBaA
I used a 1/2-13 tap and bolt to remove the rotor. If you don't have taps your can buy a basic sae/metric kit like this one http://amzn.to/2r2X9fm for pretty cheap or just a single tap http://amzn.to/2pHVnw2 .