Knucklehead Rigid Rear Frame Section
Description
Rigid hardtail frame raw steel rear section is the replica construction with components featuring brazed joints. Forgings do not have factory hallmark numbers. The rear transmission mounts are 2" from the bottom cross beam to the top of the plate. May be used to repair 1936-1947 Knucklehead frames. This rigid hardtail rear frame section includes: rear engine mount, center post, front transmission mount, transmission cross strap, spools, rear axle plates, fender cross tube, tool box mount, oil tank mount, lower fender mount, footboard tabs, as a welded assembly as pictured. Accepts 4 speed transmission mount plate, 1936-1947 mechanical rear brake components, and a 1936-1947 FL or FX front frame/neck section. The axle slots are 7/8" on both sides.
*NOTE: Installer/fabricator will have to salvage existing top tank tube, or provide a new one. Seat post and a wrap around oil tank can be installed as original. Includes cross shaft bushings installed with cross shaft. Rear axle assembly accepts star hub wheels.
*NOTE: Must be welded or brazed in place.
Specifications
- V-Twin number
- 51-0827
- Manufacturer
- V-Twin
- Sold as
- 1 - EA
- Origin
- Imported
- 2026 catalogue pages
- 644
Goes with this part
V-Twin lists these alongside 51-0827 — replacements, the parts commonly fitted at the same time, and supersessions. Check the fitment on each before ordering.