Description
Original Equipment Manufacturer (OEM) Harley-Davidson Late Shovelhead / Early Evolution 4-Speed Transmission 25-Tooth Output Final Drive Chain Sprocket.
- Part Number References: OEM #33333-80 / #3333380
- Tooth Count: 25T
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Authenticity Marking: Features the crisp, factory-original "25" stamping on the inner structural recessed shoulder.
Up for sale is a genuine vintage factory Harley-Davidson 4-speed transmission final chain-drive output front sprocket takeoff. Removed directly from a classic Big Twin gearbox assembly, this is an authentic US-made high-tensile forged steel component. It features the classic deep-spline internal transmission countershaft interface configuration introduced for 1980-later models.
Avoid cheap unbranded reproduction sprockets that suffer from soft steel heat-treating, which can cause the splines to spin or strip out or lead to rapid hooking of the outer gear teeth profiles. This factory original hardened steel sprocket handles high engine torque easily and ensures smooth, correct chain tracking alignment. It is the perfect mechanical replacement for replacing a hooked or worn sprocket, altering your final highway gear cruising RPM, or building a classic custom chopper project.
šļø Fitment & Vehicle Compatibility:
Direct factory drop-in application for standard 4-speed manual transmission countershaft splines across the following Harley Big Twin models running a final drive chain configuration:
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Harley-Davidson Shovelhead (80ci / 1340cc): Fits 1980 to 1984 FL, FLH Electra Glide platforms, and FX, FXE Super Glide, FXS Low Rider, and FXWG Wide Glide models.
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Harley-Davidson Early Evolution (Evo): Fits 1984 to 1986 FXST Softail configurations utilizing a standard 4-speed gearbox output shaft design.
š Condition Notes:
This is a pre-owned vintage factory takeoff motorcycle drivetrain component.
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The Gear Teeth: All 25 individual tooth profiles are structurally sound and true, entirely free from broken steps, heavy impact gouges, or severe tracking ridges. They show minor uniform road polishing but are free of aggressive hook-wear profiles.
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Internal Splines: The internal transmission countershaft splines are deep, clean, and fully crisp with zero wallowing or excessive mechanical play.
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Cosmetics: The steel gear exhibits a natural, rich seasoned patina with uniform normal road coloration, superficial surface storage oxidation, and typical grease staining from being stored in a workshop parts bin (as clearly detailed in the product images). It is completely structurally sound and ready to clean, lube, and mount onto your mainshaft assembly.
