Top nut is M26x1.25, Bottom nut is M30x1.25. Neither of these are common sizes but I was able to find nuts on a Roketa parts website so I ordered them. I also ordered the wheel spacers for the front wheel I was missing. Just need some spacers for the rear wheel made.
For people that are running the R1 shock. Have you found that it hits the stock muffler? I have no intention of using the stock muffler but I was planning to ride the bike to a different location to weld up the new headers
Current bikes:2006 DL650, 2008 WR250R
Past bikes: XT225, TTR125, '04 CRF50 '74 DT125,'70 TS250,'85 v45, '89 zx600c, '78 GS400x, '99 GS500E, '01 GS500E '05 Z750s, '77 GS400e, '82 GS1100ez, '97 GSX600, '07 VFR800, '03 KLR650, '03 FJR1300, '06 DL1000, '00 KLR650, '99 WR360, '08 DL650, '05 DR650, '08 EX650r, '96 CR500, '82 GS450T, '06 Ural