Kimber Shooters Forum located here. Has a great article on replacing the factory Kimber 1911 recoil spring.
Wilson Combat Flat-Wire Recoil Spring Kit
Wilson Combat has become the standard for 1911 components and accessories, this is a great walkthrough on the installation of this replacement spring/guide-rod.
The article has great step-by-step directions on how to take down and install.
Wilson Combat Replacement Recoil Spring
Check out the article here!
Replacing the Kimber 1911 factory recoil spring with the Wilson Combat Flat-Wire Recoil Spring Kit.