How do you modify cvk carburetor?

to put a bigger main jet, to put more gas to the engine. take the carburetor off. on the bottom are three screws you need to take off. then the carburetor comes in two. the biggest screw head at the top of the brass things, is the main jet. it comes out of the pilot jet, which comes out of the carb if you unscrew it. take out the main jet and put a bigger main jet in. you'll also want a free flow exhaust and free flow muffler.