I pulled the SA off my Iron Horse THS-1 and cleaned/greased it when I got the frame a month or so ago. It was made on contract by Brent, and is for all intent an purpose a short travel Weasel. Find something that has an OD slightly larger than the pivot and slightly smaller than the ID of the swingarm (IIRC I used a 32mm socket with an extension) as a drift punch. Undo the bolts and tap it out. May want to use some WD or Liquid Wrench on it first to loosen up any built up gunk. Be careful you don't catch the o-rings with the pivot on reassembly.