I installed a ZX636 linkage on my 2004 ZX10r this week end and took some measurements. I have an Ohlins shock, which is sprung for my weight. With the stock linkage I had 10mm of free sag (No rider, bike only) and 28mm of total sag (With rider and gear). This was with my spring preload set at 5 turns from full stiff. With the Zx636 linkage and the same preload I have 20mm of free sag and 44mm of total sag (With the rider). Now if I crank the preload to Full Stiff I can get 13mm of free sag and 38mm of total sag. reading through this thread it was recommended to go one spring softer with this linkage change. What I am seeing is I may need to go one spring stiffer. Has anyone, at this time, tried this mod with what ever spring was on their bike with the stock linkage, and if so what was your feeling on how this mod worked.