Has anyone had a motor randomly loose power on a restart of a race? It didn't cut off but when my son hit the gas the kart wouldn't take off. This happened twice and both times there was a pop and a flame shot out of his exhaust. I guess the third time was the charm because on the third attempt the kart took off like normal. The race timed out on the 2nd lap after it took 15 minutes for the kids to complete 1 lap so we never got to see what his motor would do throughout the race. This motor only has 8 races on it so it's fairly new.