I just installed my Darkhorse Man-O-War compensator on a 2007 Road King. DO YOUR RESEARCH! I'm very glad I researched extensively because to install the ManOWar on my bike, I had to remove the inner primary cover and upgrade the rotor cover to a newer design. (spring pack is part of the 2007 cover) The instructions are out there, but you have to wade through mountains of later models to get to the earlier stuff--and there aren't any instructions that come with the part. I didn't need to use any shims on mine, but because the inner primary cover had to come off, I needed to buy the inner primary seal and bolt kit. This gave me the opportunity to replace shaft bearings and seals that otherwise would not have been touched. Because I did my research, I had all the necessary parts on hand when the compensator arrived and I did the swap on a Saturday afternoon. My bike now starts much easier and has no 'clunk' or starter noise when it's warmed up. It's not a terribly difficult job for a weekend mechanic, but if you don't have torque wrenches and a good understanding of the basics you might want to let someone else do this.
