RTC wrote on 07/13/10 at 08:06:50:i have never torn apart a carb before. can anyone point me in the direction of some info to figure out how these parts work together? a little theory always help me out. thanks guys
Well... I'll give you a quick explanation of how the needle and seat works. Not sure if there are other threads that explain everything.
The gas flows from the petcock to the passageway directly to the top side of the seat. When the carb is empty the float is down pulling the needle with it opening the passageway for a freeflow of gas into the bowl. As the bowl fills with gas the float rises closing the seat off slowly untill it reaches the top closing the gas off completely. As you run the bike it uses gas out of the bowl and the float drops opening the needle and seat and letting more fuel in as needed.
There you go. Thats about the most basic explanation as I could think of. Hope that helps.