from my various posts.
http://www.valkyrieforum.com/bbs/index.php/topic,8482.0.htmlfirst off the valkyrie does not use metallic pads, it uses sintered bronze pads, big difference when it comes to wear of the rotors esp. stainless steel rotors. With Iron rotors u would be correct but not for the valkyrie. Sintered pads also often exceed the braking of organic pads in the wet and out perform any organic pad for maximum initial braking esp. the new HH pads. The only organics that can meet the braking of sintered pads are race organics, however they need lots of heat to do it. Not something or time to do on the street when somebody cuts into your lane. Organics have a low initial bite.
to read more see below.
http://www.sportbikesolutions.com/sintered_vs_organic.htmgood explanation of why EBC cause problems, it has to do with the torque curve of the pads
http://www.sportbikes.net/forums/general-sportbikes/384441-brake-pads.htmlDifferent brake pads have different torque curves... the coefficient of friction changes as you both heat the pads, and as you increase lever pressure. That being the case, some pads literally 'run hot' under light loads... having a high coefficient of friction from the get-go and a flat torque curve... meaning the friction co-efficient changes as you exert increasing amounts of pressure. EBC pads are an excellent example of such a pad.
Vesrah makes most OEM pads. The stock valkyrie pads are HH pads as are the Vesrah replacements.
vesrah shows them the same size backing plate, just thicknesses are different. Ferodo shows the same also. 8.2 mm is stock thk front, 9.6 mm is the max that will fit from what I have been told, in fact this thk is all that ferodo imports into USA. rear is 10.3 mm, don't know if they will squeeze in or not. I just ordered the vesrah 9.6mm for my bike from denniskirk, haven't instl them yet. they are HH pads and highly rated.
http://catalog.vesrah.co.jp/index_street_f.html click on brakes, then search
http://www.ferodoracing.com/catalogue/search.php?search=motorcycle_vehicle&cat=brake_pads