When converting to an open belt drive, removing the inner primary also removes crucial support for the transmission mainshaft. This bearing support from American Prime Mfg. solves that problem, providing the stability needed to handle the load of the clutch assembly and prevent mainshaft flex.
• Essential for Open Belt Drives: Provides critical support to the transmission mainshaft when the inner primary is removed.
• High-Strength Construction: Cast from durable 356 T6 aluminum.
• Reliable Bearing: Includes a pre-installed, automotive-style sealed ball bearing.
• Specific Fitment: For 1965-up Big Twin 4-Speed models using a rear chain.
NOTE: Will not work with super nut. Must use stock main/shaft nut.