Harley-Davidson Twin Cam, Hop-Up & Rebuild Manual

The Harley-Davidson Twin Cam engine was first manufactured in 1999, and remains the current design for all Big Twin Harleys. Today, approximately 2 million Twin Cams are out there and many of them need work. Even for those that don’t, most Harley riders are looking for “just a little more horsepower,” enough to keep up with their buddies on hopped-up Harleys.

For anyone wanting to get a little, or a lot, more power from a Twin Cam, this book presents combinations of parts that work together to provide the maximum power for the least amount of money. The crew at R&R Cycles have assembled their favorite combinations, or “recipes,” that fall into one of three hop-up categories: Mild, Medium, and Race-Ready.

In addition to Twin Cam history and theory, as well as the combinations that work, this new book includes a complete and thorough engine assembly chapter. It has more than 20 pages of sequential photos and detailed captions that explain how a professional shop with a long history of building winning race engines, assembles a Twin Cam that’s both fast and very durable.