Dumass

My name says it all. I have a '03 Honda Sporttrax 400EX with a new aftermarket carb on it that seems to be having issues. I can start it but it idles really rough and when I give it throttle it just kills the engine. I have tried adjusting the idle screw but to no avail. I am in the San Diego Ca area. Any advice will be greatly appreciated. I would also like to get an owners manual for the thing too but can't seem to find a downloadable one.