Like the others, I'm not sure of the strength of this Spring, but I noticed on My Harley a few weeks ago that the Kickstand wasn't staying where I wanted it, so I bought a new Spring, and was trying to figure out the best way to install it, when I remembered a trick that we used to tell guys who were putting a new Clutch return spring on 60-70 vintage Chevy's-
Clamp the spring in a Vise (on one end), then clamp a set of Vice Grips on the free end of the Spring-bend the spring over and put a Washer on that side and keep bending the Spring until you have as many Washers as you can get in that side-then, bend it the other way and put Washers in the other side.
When you are done, install the Spring, and close (or open) whichever way it takes to extend the Spring and the Washers will fall out-worked on my Kickstand!