Had this shock revalved and gone through by JB at ridejbi earlier this year. I’m a 195 lb intermediate rider and the shock has a 4.6 spring on it currently. I only ran this shock about 15-20 hours so it’s in great shape and needs nothing. If you need another spring I have some extras I can swap just dm me. Fits ktm big bikes with linkage - buyers responsibility to ensure fit but I believe ktm/husky 19-22 and gas gas which still run the linkage on old frame.