40037-79 Primary Chain

For riders of FXR and Touring models, the primary drive is the heart of the power transfer, and this Tsubaki primary chain is built to handle that load. Designed as a high-quality replacement for OEM 40037-79, this chain is manufactured to withstand the rigorous demands of heavy-duty Harley-Davidson engines. It features an endless construction with oval links that mirror the original equipment, ensuring seamless integration with your existing sprockets. Tsubaki’s engineering focus on durability means you can expect tens of thousands of miles of trouble-free riding. Whether you are refreshing a high-mileage bagger or maintaining a performance FXR, this chain provides the reliability and value needed for a smooth, quiet primary drive system.