I never "rebuild" carbs. Its a waste of money. All you get in a carb kit are the parts that you could clean and keep anyway. In other words whats the difference between a cleaned pilot jet, and a new one? Nothing, except you didnt pay for one of them. The only parts you should buy would be the needle valve/seat, and a new bowl gasket for each carb. My method is as follows: Disassemble each carb in a place where you will be sure not to lose any parts, a work bench with a towel or something to work above is good. Boil all jets, and the carb body in lemon juice, you can use plain water in a pinch. Save the lemon juice to use it again when you are done. Take a wire brush, and with a pair of pliers remove one of the bristles. This will give you a small thin piece of wire to clean out the holes in the jets. Then reassemble the parts, and viola. You will have a lemony fresh bike! My cousin thought that I was insane when I told him to use lemon juice, until he tried it. It will give you a clean and nice looking carb. PS: use your cell phone or a digital camera to take some snaps up close of the carbs with the bowl removed first, if you think you wont remember how to put it all back together. It comes in handy.