Hi from buzzard in Nebraska I am retired, 71,Diesel Indusrial Mechanic, I am no stranger to retrofitting bikes. I am new to motorized bikes. I have seen posts on Happy Times Motors both gppd amd bad according to price and uality. I would not purchase an engiine or motor that was not balanced or didn't have a pressurized lubricating system, With gas prices as they are, my purchase will be a 4 cycle motor.
Time and Experience Escalates to Perfection.
Enjoy the Ride! buzzard