I am confused. I have a 1987 TW200, and I just cleaned and rebuilt the carburetor as advised by members of this group. Thanks! I am in the process of tuning it, and was trying to find the best setting for the pilot screw. It turns our the best setting is with the screw all the way in. How is that possible? I thought the fuel would be cut off with the screw all the way in. Am I missing something?