I can tell you from first hand experience that 7/8 and 22mm are not the same. Yes I know its only .2 mm difference but a new throttle perch later I know it will crack the perch casting. Not all 7/8 bars are the same size given the +/- of manufacturing, the thickness of the plating, paint, powder coating, etc. but all of them are larger than the opening in the perch. I spent hours with a grinder and belt sander trying to get the chrome off of a set of drag bars just to remove the .2mm and in the end I didn't like the way they looked. Try and find a set of clip-on bars and then you have the luxury of placing them as high or low on the fork tube as you want. I ended up with a set of Tomasselli 4-way adjustable clip-ons and they are perfect but not cheap.