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

This Genuine Zodiac diaphragm clutch spring is a high-quality replacement for 1998–2000 Evolution Big Twin and 1999–2017 Twin Cam models. It fits Dyna, Softail, Touring, and Trike models, serving as a direct replacement for OEM 37871-98. Whether you are looking for a stock-style replacement to restore original lever feel or a heavy-duty version for a performance build, this spring provides the necessary tension for reliable clutch engagement. The heavy-duty options can offer 20% to 25% more pressure than stock, which is ideal for high-torque engines that need extra clamping force to prevent slipping. Keeping your clutch spring in good condition is essential for a healthy primary drive, and Zodiac precision manufacturing ensures this spring will stand up to the demands of daily riding or long-distance touring.