I was never happy with the shape of the original handlebars on my R. Didn't seem to fit straight through the hands, rather at an angle. Then got Magura X-Line bars from Ebay for �25, worth trying. Also ordered 10mm higher risers from OTR. Later found out my local bike shop had them in stock all along. All made by Magura( as apparently most of the other fat bars are) just under another brand.
No problems fitting the bars. But two holes needed drilling for the switch gear. At 10mm no issues with cables, just. As for guards the standard fitting kits don't work anymore. Most manufacturers sell special ones for taper bars.
The result was quiet remarkable! Money well spend. Perfect fit for my 181cm, solid feel and looks great. So that is why BMW, KTM and Ducati fit them as standard. Come on Yamaha, if you can't fit them from new at least copy them as well as you can. They are better!

Rob

P.S.
Does anybody know how much a replacement bar is from Yamaha?