Originally Posted by DougZ73
Do you know for a fact that the R has weaker brakes??
As far as I understood, the X just runs a bigger rotor, therefore, it(caliper) is mounted further out on the fork tube, achievable with an adapter bracket. I had always thought the calipers and pads were the same, albeit with different first three digits in the part number, due to Yamaha's numbering system, and those first three digits referencing the bike the parts are for.
Sounds like I'm splitting hairs and the R hubs/rotor/brake components laced to SM wheels would be fine.
I did shoot an email to Wheeling Supply.
After I resolve the wheels question it'll be on to the exhaust/ECU/tuning dilemma.
Wish I could do a Jay Leno, ask that the bike be setup and let me know when ready.