Why are the 2 stroke engines that are called 66cc/80cc called that, aren't they one or the other cc? I have this engine [Flying Horse, 66cc, Engine Family: 9JFHS 066?FH] and seems to be a popular engine and I would like more detailed specs on the motor. I am looking for things like spare parts sources, quality replacement parts, simple upgrades, specifications of the motor, other names the motor is called for this motor only. I want to have a number of builds going on soon. I want to keep it simple and have all the motors the same, for ease of repair, having parts on hand and common problems & issues I can deal with easier, etc.