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Harley Big Twin Compensating Sprocket Assembly 1970-2006 Evo TC88 OEM 40275-70

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Harley Big Twin Compensating Sprocket Assembly 1970-2006 Evo TC88 OEM 40275-70 photo 1 Harley Big Twin Compensating Sprocket Assembly 1970-2006 Evo TC88 OEM 40275-70 photo 2 Harley Big Twin Compensating Sprocket Assembly 1970-2006 Evo TC88 OEM 40275-70 photo 3 Harley Big Twin Compensating Sprocket Assembly 1970-2006 Evo TC88 OEM 40275-70 photo 4 Harley Big Twin Compensating Sprocket Assembly 1970-2006 Evo TC88 OEM 40275-70 photo 5 Harley Big Twin Compensating Sprocket Assembly 1970-2006 Evo TC88 OEM 40275-70 photo 6 Harley Big Twin Compensating Sprocket Assembly 1970-2006 Evo TC88 OEM 40275-70 photo 7

Description

Premium Factory Primary Drive Stock — Lifestyle Powersports Inventory Vault
Up for sale is a genuine, Harley-Davidson Factory OEM Big Twin 24-Tooth Compensating Sprocket Assembly (Master Kit #40275-70). Sourced from a clean, low-mileage bike, these internal mechanical components are preserved in excellent used garage-stored condition. Unlike modern budget reproductions or brittle aftermarket variants, this original factory assembly utilizes correct spring-pack preload and heat-treated cam ramps to protect your crankshaft splines and smooth out heavy V-Twin firing impulses.
Product Specifications & Mechanical Parameters:
  • Brand: Harley-Davidson (Original Equipment Manufacturer - OEM)
  • Component Type: Engine Compensator Assembly / Primary Drive Extension Sprocket
  • Master Assembly Tooth Count: 24-Tooth (24T) Duplex dual-row primary chain style [2]
  • OEM Factory Part Number: #40275-70 (replaces historical index #40275-70A or #40275-70D)
  • Platform Fitment Bounds: Direct factory drop-in replacement for standard primary drive setups on 1970 to 2006 Harley-Davidson Big Twin models (Alternator Shovelhead, Evolution 80", and Twin Cam 88 5-Speed engines):
    • 1970–1984 Shovelhead Alternator Models (FLH / FX / FXE / FXWG)
    • 1984–1999 Evolution Big Twin 80" (Softail / Touring / Dyna)
    • 1999–2006 Twin Cam 88" 5-Speed Platforms (FXST / FLST / FLH / FXD)
  • Exclusions: Will NOT fit early 1965–1969 Generator Big Twins, Sportster XL models, or 2006-later Dyna / 2007-later Touring and Softail 6-speed configurations which feature the completely redesigned bolt-on high-output splined compensator hubs.
  • Condition Details: Clean used garage stock. The slider cam ramp peaks show solid, uniform profiles with minimal pitting or grooving wear. The 24 teeth on the primary drive sprocket display clean lines with zero sharp hooks or chipped valleys. Internal splines matching the engine sprocket shaft are sharp and untwisted. Staged in light storage oil to shield against warehouse storage humidity.

Harley Big Twin Compensating Sprocket Assembly 1970-2006 Evo TC88 OEM 40275-70

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Premium Factory Primary Drive Stock — Lifestyle Powersports Inventory Vault Up for sale is a genuine, Harley-Davidson Factory OEM Big... Read more

1 in stock

$45.00

      Description

      Premium Factory Primary Drive Stock — Lifestyle Powersports Inventory Vault
      Up for sale is a genuine, Harley-Davidson Factory OEM Big Twin 24-Tooth Compensating Sprocket Assembly (Master Kit #40275-70). Sourced from a clean, low-mileage bike, these internal mechanical components are preserved in excellent used garage-stored condition. Unlike modern budget reproductions or brittle aftermarket variants, this original factory assembly utilizes correct spring-pack preload and heat-treated cam ramps to protect your crankshaft splines and smooth out heavy V-Twin firing impulses.
      Product Specifications & Mechanical Parameters:
      • Brand: Harley-Davidson (Original Equipment Manufacturer - OEM)
      • Component Type: Engine Compensator Assembly / Primary Drive Extension Sprocket
      • Master Assembly Tooth Count: 24-Tooth (24T) Duplex dual-row primary chain style [2]
      • OEM Factory Part Number: #40275-70 (replaces historical index #40275-70A or #40275-70D)
      • Platform Fitment Bounds: Direct factory drop-in replacement for standard primary drive setups on 1970 to 2006 Harley-Davidson Big Twin models (Alternator Shovelhead, Evolution 80", and Twin Cam 88 5-Speed engines):
        • 1970–1984 Shovelhead Alternator Models (FLH / FX / FXE / FXWG)
        • 1984–1999 Evolution Big Twin 80" (Softail / Touring / Dyna)
        • 1999–2006 Twin Cam 88" 5-Speed Platforms (FXST / FLST / FLH / FXD)
      • Exclusions: Will NOT fit early 1965–1969 Generator Big Twins, Sportster XL models, or 2006-later Dyna / 2007-later Touring and Softail 6-speed configurations which feature the completely redesigned bolt-on high-output splined compensator hubs.
      • Condition Details: Clean used garage stock. The slider cam ramp peaks show solid, uniform profiles with minimal pitting or grooving wear. The 24 teeth on the primary drive sprocket display clean lines with zero sharp hooks or chipped valleys. Internal splines matching the engine sprocket shaft are sharp and untwisted. Staged in light storage oil to shield against warehouse storage humidity.

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