Replica Weld-On Hardtail Frame Section for Harley Big Twin FX FL Custom Build

This is a builder’s component — and if you’re reading this, you already know what that means. The replica weld-on rear hardtail section is duplicated from an original rigid frame, giving your custom build the authentic geometry of a true chopper without having to start from scratch.

Designed to integrate with existing softail-era frames, it includes all the critical mounting points your build needs: rear transmission mount, tool box bracket, fender cross brace, seat post top yoke, and two dowel pins to align the lower frame tubes. The axle slots are 7/8" on both sides for correct fitment.

What’s Included

• Rear hardtail section (weld-on type)
• Rear transmission mounts (1-1/2" tall)
• Tool box bracket
• Fender cross brace
• Seat post top yoke (unwelded — fabricator must fit)
• 2 dowel pins for lower tube alignment

Fitment

• 1958–1984 FL
• 1971–1984 FX

Builder Notes

• Weld-on type only — no seat post bushing included (must be ordered separately)
• Lower tube inserts and seat post yoke assembly require professional welding, alignment, and fitting
• Transmission height shimming may be required
• Due to size/weight, UPS may classify this as oversized, which may increase shipping costs