Hi guys, back with some more stupid begginer questions. I'm seriously considering upgrading my engine to a Zenoah g270 and I had a couple of questions. First off, does the engine come from the factory with the carb needles set correctly? Or will I have to adjust them myself. Also will I need to buy anything to make it fit or will the motor be a direct bolt up to where the stock cy 26cc originally was. The car is a Hpi baja 5b SS. Any help would be great.