Interesting at 30 lb unhortened springs even no damper my comet wa not the smoothest and with aVo damper very stiffEven the original springs I had made which were about 38 to 42 odd pounds per inch, I have had to chop the lot shorter to get the bike sitting right. It was a pair of these springs we used in my friends Comet, and stock Koni shocker on its weakest setting, the bike felt fabulous on the first ride. The pre-load was about 20 mm, we could almost compress the upper spring box by hand and install the upper fixing bolts.