This topic comes up all the time on many sites so I thought I'd share the way I did it when I put mine on the last time. I secured the bike with straps on my HF lift and used a scissor jack to get the rear wheel off the ground. Then took a piece of small dia. chain and put hooks on both ends and with the center stand bolted in place I put one hook in the eye of the center stand spring and the other on one of the spokes of the rear wheel (I covered the hook with shrink wrap to protect the spoke). Then had a friend rotate and hold the rear until the spring was stretched enough so I could insert the tip of the spring into the centerstand. It took some fiddling but it worked very well. If I had no assistance I probably could have slid a broom handle into the spoke or dropped it into 2nd but it was easier with a friend. It really does not take much to stretch the spring using this method.
Dave
Dave