25-3102 Balls inner primary bearing & seal kit

When you are dealing with a straight splined shaft on a Big Twin, this All Balls inner primary bearing and seal kit is the upgrade you need. Featuring a double row ball bearing for enhanced stability and load distribution, this kit is designed specifically for 1990 to 2006 Big Twin models, though it excludes the 2006 Dyna. It is a comprehensive solution for refreshing the inner primary support, ensuring that the transmission mainshaft remains perfectly aligned under load. This kit is sold as a complete set, providing everything required to replace the worn factory bearing and seal. It is a must-have for any high-mileage rebuild where drivetrain reliability is the priority.