S&S Cycle 31-4013 Timken Sprocket Shaft Bearing Left Side

The S&S Cycle 31-4013 is a premium Timken sprocket shaft bearing designed for Harley-Davidson Big Twin engines. This complete left side main bearing set delivers the durability and precision that Timken bearings are known for, making it an essential component for engine rebuilds and performance upgrades.

Key Features:

• Genuine Timken tapered roller bearing for superior load handling and longevity
• Direct OEM replacement for 1984-2002 Big Twin models
• Enables Timken bearing conversions on 2003-2016/2017 Twin Cam engines
• Complete left side sprocket shaft bearing set for simplified installation
• Made in the USA with quality construction
• Replaces OEM part number 9028

This bearing is ideal for riders seeking a reliable factory replacement or those upgrading to Timken bearings for improved performance and durability. The precision engineering ensures proper flywheel endplay and bearing fit when installed correctly following manufacturer specifications.