37871-98+ Diaphragm Clutch Spring for 1998-2000 Big Twin & 1999-2017 Twin Cam

If you are feeling some slip in your clutch, it might be time to upgrade your spring. This Alto diaphragm clutch spring is designed for 1998–2000 Evolution Big Twins and 1999–2017 Twin Cam models, including Dyna, Softail, Touring, and Trike applications. It serves as a replacement for OEM part number 37871-98+. Alto offers these in various tensions, allowing you to choose between a stock-style replacement or a heavy-duty version that provides significantly more pressure than the factory original. This is a great way to improve power transfer and clutch engagement, especially on bikes with performance upgrades. It is a simple, effective component that ensures your clutch can handle whatever you throw at it.