1409KMT Harley Big Twin Mainshaft Inner Bearing Race Installer/Puller 1984–Present, Black Oxide

1409KMT's installer/puller removes and installs the mainshaft inner bearing race on 5- and 6-speed Big Twin transmissions (fits 1984–present and replaces OEM #34902-84).

If you're working on a Harley-Davidson Big Twin transmission from 1984 onward, this dedicated tool from 1409KMT simplifies the often tricky job of extracting and seating the mainshaft inner bearing race. Built as a direct replacement for the OEM tool #34902-84, the set is finished in black oxide for corrosion resistance and includes all parts shown in the product images for immediate use in the garage or shop.

How does this tool make mainshaft bearing race removal easier?

The 1409KMT puller is shaped to grip and extract the inner race without damaging surrounding transmission components. It provides mechanical leverage and controlled force so you can remove the race cleanly, reducing the risk of scoring shafts or cases.

• Tailored fit for Big Twin 5- and 6-speed transmissions (1984–present).
• Designed to engage the inner race securely for straight pulls.
• Black oxide finish helps resist corrosion and wear over repeated use.

Can I use this tool to reinstall the bearing race accurately?

Yes — the kit functions as both a puller and an installer, allowing you to seat the inner race squarely without hammering directly on bearings or shafts. The installer components guide the race into position to achieve proper alignment and fit.

• Parts included to support controlled, even seating of the race.
• Reduces risk of misalignment that can cause premature bearing failure.
• Fits 5-speed and 6-speed Big Twin transmissions for consistent results.

Is this an OEM replacement and will it fit my Harley model?

This 1409KMT tool set is made as a direct replacement for OEM tool #34902-84 and fits Big Twin Harley-Davidson transmissions from 1984 to present. If your bike uses a five- or six-speed Big Twin transmission in that range, this tool will match the OEM function and fit.

• Direct replacement for OEM #34902-84, simplifying parts selection.
• Compatible with all 1984–present Big Twin five- and six-speed transmissions.
• Comes brand new and complete with the components shown in product images.

What materials and finish does the tool use for durability?

The puller/installer is produced with a durable finish to extend service life in workshop environments. The black oxide coating resists surface corrosion and gives the components a tougher exterior for repeated installations and removals.

• Black oxide finish for improved corrosion resistance.
• Manufactured to withstand repeated mechanical use in a garage setting.
• Sold new, including all parts depicted for immediate application.

Who is this for: This 1409KMT transmission mainshaft inner bearing race installer/puller is intended for motorcycle technicians, home mechanics, and Harley-Davidson enthusiasts who perform drivetrain servicing on Big Twin models from 1984 onward. If you want a purpose-built replacement for the OEM #34902-84 that helps protect shafts and bearings during removal and installation, this kit delivers a practical, workshop-ready solution.