Yep its got a .70 bore, piston, bigger carb (i think), and some other stuff. The guy I got it from didnt tell us much about its aftermarket parts. It isnt running at the moment because the previous owner is an idiot. He took off the oil tank and thought that was all you needed to do to block off the oil injection. He still has the pump hooked up. Then he used mixed gas in the tank and tried to run it like that.