Installing a new camshaft in your Harley-Davidson Big Twin or Sportster engine is one of the most popular performance improvements. Changing the camshaft can result in significant increases in horsepower. Installing a new camshaft can be done without having to tear down the entire engine. While putting in the camshaft is more complex than putting in a new ignition module or installing a performance air cleaner, anyone with reasonable mechanical skills and a few tools can perform the task themselves.

After selecting the best camshaft for your bike, you can install the camshaft in your bike in a couple of hours work. Before you start this job, make sure you have all the tools and parts required. Once you have everything you are ready to start working. Here are step-by-step instructions for the installation of a camshaft in a Harley-Davidson Big Twin Evolution or Shovelhead engine.