Not sure why that post was quoted, but if you are trying to replace needles, the throttle shaft does not need to be removed. Removing it sometimes causes unnecessary damage.
The cross-head screw holding the slide-lifting-arm needs to be removed from the throttle shaft completely. It is not a philips screw. Using a philips screwdriver will definitely damage the screw. The screw is a JIS screw and needs a JIS screwdriver to get out.
If this is the first time its removed, it will be very very tight. The back of the shaft must be supported to prevent bending and damaging the throttle shaft. Supporting the back of the carb body does no good because the shaft is not supported in the body. The shaft just floats through the body. There are rubber seals on the shaft at the body, but there are no bearings there, it just floats. You must support the actual shaft. I almost always have to use an impact driver to get them out the first time and thus they really have to be supported well against the impact. Try to use a soft metal plate, like aluminum, between the body and the shaft support.
The slide-lifting-arm is sometimes called a bell-crank.
Then after that screw is out, you can follow these procedures to get the slide holder out of the slide. Those screws are also JIS, so you should get a complete set of drivers.
s3.amazonaws.com/gpzweb/TK22mainPage/TK2.../TK22needleSwap.html
