Ok some of you know already that I picked up a 73 cb500 for free, it needed work because it sat for 5 years with gas in it and I have done most of it already with the help of my dad. Starting from the beginning I cleaned the gas tank out, replaced fuel lines, and had my dad clean the carbs(I don't know carbs very well). Then I put new throttle cables on and my dad adjusted the clutch because the previous owner said it was slipping so hopefully it fixes it since there was a lot of play. Yesterday at a swap meet I picked up a new exhaust because straight pipes are way to loud and coil with plug wires. In the process of working on it the throttle sleeve broke so i went to iron pony and bought a new sleeve, had a front tire put on, and bought a battery for it. Once i get this thong running right I'll put a new rear tire on, but until then. Currently the problem we're facing is cylinder 3 isn't firing, the header coming out is cold. We checked the spark plugs and they're sparking fine, so we think the carb is running lean, a burnt valve, or there is still some dirt in the carb(my dad said it was the worst). Were also gonna do a compression check but ran outta time.