APM Transmission Bearing Support — Harley-Davidson Electra Glide, Softail Heritage Classic, Electra Glide Classic (1970-2026)

APM Transmission Bearing Support is a cast 356 T6 aluminum bracket with an automotive-sealed ball bearing that supports the transmission main shaft when running an open belt drive without an inner primary. It carries the full load of the clutch basket and associated components.

Features

• Cast 356 T6 aluminum construction
• Automotive-style sealed ball bearing
• Supports open belt configurations
• Rear chain drive only

Specifications

• Brand: APM
• Manufacturer Part #: 1120-0002
• Material: 356 T6 aluminum
• Length: 9 in
• Width: 5 in
• Height: 5 in
• Weight: 1.45 lbs

Fitment

Fits 1965-and-later Harley-Davidson Big Twin 4-speed models with rear chain drive and open belt primary configuration.

Frequently Asked Questions

Will this work with a super nut?

No — this bracket is not compatible with super nuts. You must use the stock main shaft nut.

Can I use this with a belt drive and inner primary?

No — this support is designed only for open belt configurations where the inner primary has been removed.

Does this fit Sportster or recent Big Twins?

This part is for 1965-up Big Twin 4-speed models with rear chain drive. It will not fit newer six-speeds or front-chain drive configurations.

What bearing is included?

An automotive-style sealed ball bearing rated to support the full load of the clutch basket and drive components.

Will I need any modifications to install this?

Installation requires removal of the inner primary and use of the stock main shaft nut — no modifications to the frame or cases needed.