Get a threadless adapter for your bike or bikes and then changing stems and bars becomes easier. You don't even have to remove the bar tape, STI's or anything else on the bars when you decide to try a different stem length. Here is one just to show you what it is.

https://www.treefortbikes.com/Zoom-Q...rk-286mm-1-1-8

You can find them in all different finishes and colors if you look enough. Of course you'll have to buy the stem too. Notice this and most others go from the 1" quill size to let you use a standard 1 1/8" stem with whatever diameter your handlebars clamp area is.

On your current stem and bars, you have to turn the bars to find what will allow the bends to go through the stem. You might also have to pry the clamp on the bars open just a very little bit.