The trusty E-Bike kit 9 continent motor has gone racing and not only survived but did well! With vent holes, no overheating issues, and the wires into the hub did not cook. I did put 12 guage phase wires on it from the controllers to the forks, but left the wires stock into the hub.
Running 40 amps of 100v, I was reaching about 40 mph on the kart track. With a long straighaway, 47 mph is possible. Gasoline bike riders eyes were bugging out all over, when they saw this thing take off after a corner. Only one guy was faster, and he got black flagged. Unfortunatley, I mis read the flag to mean everybody, and got off too as I was leading the race.
I'll get em next time, with my ebikekit.
THE LIPO RULES. NEVER ABOVE 4.3V NEVER BELOW 2.7V DON'T PUNCTURE
Ideal charging /discharging range for Lipo, 3.65v minimum 4.1v maximum
See battery technology section, FAQ thread at the top of the page for lipo noob info.