Both bikes need to go asap. Out of my living room. Got over $7000.00 into the stealth and $2500.00 into the Razor. I am taking a major lose. The razor not runing is a wheelie machine with sprocket kit and the Stealth bomber running. You can have the old controllers. ND72680 and ND72450 and KR5V mid motor not working. Could be me not know what I am doing. 1st come first serve.