I have a 1963 Allstate and have recently installed a new Stoffi spring on the front fork. This Stoffi spring made a tremendous difference in the stability and handling of the bike on the rather good roads I currently ride. However, I trailered the Allstate up to my brothers (150 miles away) and had the chance to compare my ride with his on some very rough roads. His bike is a 1965 Vespa VBB with the standard spring and damper on the front fork. I must say that I was impressed with how well his bike handled on the rough roads we traveled. It was solid and never bottomed out. By contrast, my Allstate did not do well on these poor roads. It would bottom out and stability was not as good as the 1965 Vespa.
I then decided to replace the Allstate front fork with a VBB fork and found one. The VBB fork has the standard spring on it now. Should I replace this standard spring with my new Stoffi spring while I have both forks on the bench? Would it make the ride better or perhaps make it too firm on a VBB fork which has the damper as well. If the experts feel the standard spring will work just fine and there is no advantage to installing the Stoffi spring, then I will leave it alone. If, on the other hand, the Stoffi spring would enhance an already good ride, then I will install the Stoffi spring on the VBB fork. Thanks for your comments.