'12 - '14 ?
The rearward facing cylinder YZ bikes have the new TC and offsets, whatever year those are.
The WR upper fork tubes are 54mm. The new YZ upper fork tubes are 52mm. You need to bore out the upper clamp 2mm. I used a simple boring bar on a milling machine. It took an hour.
Edited by MidlifeCrisisGuy, June 15, 2015 - 02:02 PM.