A little info before committing to a purchase ............
There are 2 different length mirrors available ....(in regard to the longest part of the mirror arm)...the shorter of which will result in you having a nice view of your forearms no matter how you adjust them.
The USA XS1100 (god bless em ) had wider ( read crappier) stock handlebars and thus a shorter length mirror stem .
As most of the mirrors are aftermarket or possibly (but doubtful ) NOS from the good ol USA you will need to carefully consider these purchases in conjunction with the handlebars you have on your bike.
Mirrors on a motorbike are a "life or death " item.
Speaking of which you ll also have to make sure you don t end up with the ............"objects in the mirror may be closer than you think" type.
Choose carefully..........your life may depend on it.