Sonnax HDNB0009 Koyo Transmission Main Drive Bearing for Harley FX/FL (1977–1981)

The Sonnax HDNB0009 Koyo Transmission Main Drive Bearing is a precise-fit replacement designed for Harley Davidson Big Twin transmissions, specifically FX and FL models from 1977 to 1981. It supports smooth gear engagement and long-lasting drivetrain performance in your motorcycle’s transmission assembly.

Key specifications in brief

• Outer diameter: approximately 2.005 inches
• Inner diameter: approximately 1.638 inches
• Width: approximately 0.61 inches
• OEM cross reference: 8905
• Designed for Harley Davidson FX and FL models from 1977 to 1981
• Manufactured in Taiwan
• Meets OEM standards

Designed for reliable performance and a durable service life, this bearing is a solid choice for maintenance or a rebuild project. Pair it with compatible installation accessories to facilitate service, such as the Counter Sprocket Nut Tool, 4-Speed Transmission Arbor Tool, Mainshaft Seal Remover and Installer, and Mini Motorcycle Lift Tool.

Fits Harley Davidson FL and FX motorcycles from 1977 through 1981, providing a precise fit that helps prevent transmission issues and extend the life of your drivetrain. Ideal for enthusiasts and mechanics who demand a dependable, OEM-standard replacement for their Harleys.

Koyo transmission main drive bearing for Big Twin models.

The Sonnax HDNB0009 Koyo Transmission Main Drive Bearing is a high-quality replacement part designed specifically for Harley Davidson FX and FL models from 1977 to 1981. This bearing measures approximately 2.005 inches in outer diameter, 0.61 inches in width, and 1.638 inches in inner diameter, ensuring a precise fit within your transmission assembly. Crafted with durability in mind, this bearing offers reliable performance and longevity, making it an essential component for maintaining smooth transmission operation. Manufactured in Taiwan, it meets OEM standards, providing confidence in its quality and compatibility. The HDNB0009 bearing is an ideal choice for enthusiasts and mechanics seeking a dependable solution for transmission maintenance or rebuild projects. Proper installation of this bearing can help prevent transmission issues and extend the lifespan of your motorcycle's drivetrain. To facilitate installation and maintenance, consider pairing this bearing with other accessory items such as the Counter Sprocket Nut Tool, 4-Speed Transmission Arbor Tool, Mainshaft Seal Remover and Installer, and Mini Motorcycle Lift Tool. Ensure your Harley Davidson motorcycle remains in optimal condition with this premium transmission main drive bearing, engineered for precise fit and long-lasting performance.

Features:

• Outer diameter: approximately 2.005 inches

• Inner diameter: approximately 1.638 inches

• Width: approximately 0.61 inches

• OEM Cross Reference: 8905

• Manufactured in Taiwan for quality assurance

• Designed for Harley Davidson FX and FL models from 1977 to 1981

• Durable construction for reliable transmission performance

• Easy to install with compatible accessory tools

Fitment:
Harley Davidson FL 1977
Harley Davidson FL 1978
Harley Davidson FL 1979
Harley Davidson FL 1980
Harley Davidson FL 1981
Harley Davidson FX 1977
Harley Davidson FX 1978
Harley Davidson FX 1979
Harley Davidson FX 1980
Harley Davidson FX 1981