where the floats are take teh pin put, the spring in rides on is inside a little bullet shaped piece. if something gets in ther it can mess up that piece, or cause teh floats to stick. (its called a needle to seat btw) you can also replace that part in a carb rebuild kit. now if you push on the rod on teh top of that NTS and it doesnt spring back up..guess what..its bad. make sure to blow compressed air threw that carb after you use a fluid cleaner.
gas inst really a good cleaner for a carb. gas sometimes is really dirty. full of sediment. sediment is small enough to pass thru a screen, and quads dont have a filter..so....
ill look for that carb body, and ship it to you. that pickup tube (piece that is missing) cannot be bought, its part of the carb body.......dont worry, rockstars hooking you up...hahahahaha