KLR650 Photos and Review
From the back you can see that the bars are wide, but with only the topcase, the bike is narrow. Notice handlebar height, and footpeg height.
This was my only bike with a top case. I loved the topcase! It doesn't make the bike wider, it holds a full-face helmet easily, and the locking mechanism is good. This is a Givi top case, and might have been on some kind of generic mounting plate.
The only issue with the Givi topcase was that the hinges are not very strong. The plastic was getting those white marks that plastic gets when it has been over-stressed. I added a strap to keep the lid from resting on the hinge stops.