This may be come off as a really ignorant question, but I bought a SE version of a Mikuni HSR45 from another forum member and I cannot find any way to adjust the idle speed. This is my first experience with this carb model so, I thought maybe I am overlooking something. I went online and it appears to me that a part is missing,
the idle adjuster 
. I see only threads in the spot where it is shown on the diagram.
Can someone please confirm the idle screw location from the attached picture, just in case I have the wrong diagram ? If it is missing any idea on the fastest place to order a new one ? In the part list it also mentions a long and short version - will either work - is one easier to adjust than the other ?
Thanks for your help.