Description
The mainshaft bearing is a critical component in your Big Twin’s transmission, directly affecting power delivery, shifting smoothness, and overall drivetrain longevity. A worn or damaged bearing will introduce play in the mainshaft, compromising shift quality and potentially leading to catastrophic transmission failure. The EASTERN MOTORCYCLE PARTS Left Main Bearing 45-0215 is a direct OEM replacement engineered to factory specifications, restoring your transmission to like-new performance and reliability.
- Fits: 5-speed Big Twins
- Manufacturer: EASTERN MOTORCYCLE PARTS
- MPN: 45-0215
- Application: Left mainshaft bearing
- Fitment: OEM replacement
- Installation: Requires transmission disassembly
- Material: Precision bearing steel
- Function: Mainshaft support bearing
- Maintenance: Replace during transmission rebuild
