There are a total of 4 bolts that you need to loosen, two on the lower yoke, two on the upper yoke. If I remember right, the lower bolts are 8mm Hex Head, the upper bolts are 5mm Hex head. Once I had my bolts loosened, I just couldn't persuade the stanchions to move upward, but I'll try again using the jackstand to lower the bike's weight against them, like what Sweatmachine said. No, you don't have to pull the shrouds.
