Shop by vehicle


Your Garage


You can login or create an account to save vehicles to your personal garage.
Getting current inventory...

S&S 117 to 128 Big Bore Kit 4.2520in Bore x 4.5in Stroke Fits 2017+ M8

$1,559.95

Add to Cart:


Please select a vehicle to verify part fitment

Details

  • SKU: 910-0733
  • Manufacturer: S&S Cycle

Description

    California Restricted

    California laws prohibit (in most cases) the use of any aftermarket product whose installation requires the removal of any emissions control related components as regulated by the California Air Resources Board (www.arb.ca.gov).

    If an item is designated as "Competition and Racing Vehicles Only", we will require a race waiver be digitally signed before an item can ship to California. If an item is to be exported from California, an export waiver is available as well. This is a REQUIRED guarantee from you that a restricted item will NOT be used on any public highway in California; only on private race tracks in racing or competition use.

    This big bore kit is designed to increase the displacement of Milwaukee-Eight engines from 117 to 128 cubic inches. It features a 4.2520-inch bore and a 4.5-inch stroke. The kit includes cylinders finished in a durable coating with fin highlighting for a factory-like appearance. Ideal for riders looking to boost power and performance.

    This part fits the following

    TypeMakeModelYearEngineLocationRequiredNotes
    MotorcycleHarley DavidsonFLFBS Softail Fat Boy 1142018114 CI1
    MotorcycleHarley DavidsonFLFBS Softail Fat Boy 1142019114 CI1
    MotorcycleHarley DavidsonFLFBS Softail Fat Boy 1142020114 CI1
    MotorcycleHarley DavidsonFLFBS Softail Fat Boy 1142021114 CI1
    MotorcycleHarley DavidsonFLFBS Softail Fat Boy 1142022114 CI1
    MotorcycleHarley DavidsonFLFBS Softail Fat Boy 1142023114 CI1
    MotorcycleHarley DavidsonFLHCS Softail Heritage Classic 1142018114 CI1
    MotorcycleHarley DavidsonFLHCS Softail Heritage Classic 1142019114 CI1
    MotorcycleHarley DavidsonFLHCS Softail Heritage Classic 1142020114 CI1
    MotorcycleHarley DavidsonFLHCS Softail Heritage Classic 1142021114 CI1
    MotorcycleHarley DavidsonFLHCS Softail Heritage Classic 1142022114 CI1
    MotorcycleHarley DavidsonFLHCS Softail Heritage Classic 1142023114 CI1
    MotorcycleHarley DavidsonFLHFB Electra Glide Highway King2023114 CI1
    MotorcycleHarley DavidsonFLHRXS Road King Special2019114 CI1
    MotorcycleHarley DavidsonFLHRXS Road King Special2020114 CI1
    MotorcycleHarley DavidsonFLHRXS Road King Special2021114 CI1
    MotorcycleHarley DavidsonFLHRXS Road King Special2022114 CI1
    MotorcycleHarley DavidsonFLHRXS Road King Special2023114 CI1
    MotorcycleHarley DavidsonFLHTCUTG Tri Glide Ultra2019107 CI1
    MotorcycleHarley DavidsonFLHTCUTG Tri Glide Ultra2020107 CI1
    MotorcycleHarley DavidsonFLHTCUTG Tri Glide Ultra2021107 CI1
    MotorcycleHarley DavidsonFLHTCUTG Tri Glide Ultra2022114 CI1
    MotorcycleHarley DavidsonFLHTK Ultra Limited2019107 CI1
    MotorcycleHarley DavidsonFLHTK Ultra Limited2020114 CI1
    MotorcycleHarley DavidsonFLHTK Ultra Limited2021114 CI1
    MotorcycleHarley DavidsonFLHTK Ultra Limited2022114 CI1
    MotorcycleHarley DavidsonFLHTK Ultra Limited2023114 CI1
    MotorcycleHarley DavidsonFLHTKL Ultra Limited Low2019107 CI1
    MotorcycleHarley DavidsonFLHXS Street Glide Special2019107 CI1
    MotorcycleHarley DavidsonFLHXS Street Glide Special2020114 CI1
    MotorcycleHarley DavidsonFLHXS Street Glide Special2021114 CI1
    MotorcycleHarley DavidsonFLHXS Street Glide Special2022114 CI1
    MotorcycleHarley DavidsonFLHXS Street Glide Special2023114 CI1
    MotorcycleHarley DavidsonFLHXST Street Glide ST2022117 CI1
    MotorcycleHarley DavidsonFLHXST Street Glide ST2023117 CI1
    MotorcycleHarley DavidsonFLTRK Road Glide Limited2020114 CI1
    MotorcycleHarley DavidsonFLTRK Road Glide Limited2021114 CI1
    MotorcycleHarley DavidsonFLTRK Road Glide Limited2022114 CI1
    MotorcycleHarley DavidsonFLTRK Road Glide Limited2023114 CI1
    MotorcycleHarley DavidsonFLTRU Road Glide Ultra2019107 CI1
    MotorcycleHarley DavidsonFLTRXS Road Glide Special2019107 CI1
    MotorcycleHarley DavidsonFLTRXS Road Glide Special2020114 CI1
    MotorcycleHarley DavidsonFLTRXS Road Glide Special2021114 CI1
    MotorcycleHarley DavidsonFLTRXS Road Glide Special2022114 CI1
    MotorcycleHarley DavidsonFLTRXS Road Glide Special2023114 CI1
    MotorcycleHarley DavidsonFLTRXST Road Glide ST2022117 CI1
    MotorcycleHarley DavidsonFLTRXST Road Glide ST2023117 CI1
    MotorcycleHarley DavidsonFXBBS Softail Street Bob2021114 CI1
    MotorcycleHarley DavidsonFXBBS Softail Street Bob2022114 CI1
    MotorcycleHarley DavidsonFXBBS Softail Street Bob2023114 CI1
    MotorcycleHarley DavidsonFXBR Breakout2023117 CI1
    MotorcycleHarley DavidsonFXBR Softail Breakout2018107 CI1
    MotorcycleHarley DavidsonFXBRS Breakout 1142020114 CI1
    MotorcycleHarley DavidsonFXBRS Softail Breakout 1142018114 CI1
    MotorcycleHarley DavidsonFXBRS Softail Breakout 1142019114 CI1
    MotorcycleHarley DavidsonFXDR Softail 1142019114 CI1
    MotorcycleHarley DavidsonFXDR Softail 1142020114 CI1
    MotorcycleHarley DavidsonFXDR Softail Power Cruiser 1142019114 CI1
    MotorcycleHarley DavidsonFXFB Softail Fat Bob2018107 CI1
    MotorcycleHarley DavidsonFXFBS Softail Fat Bob 1142018114 CI1
    MotorcycleHarley DavidsonFXFBS Softail Fat Bob 1142019114 CI1
    MotorcycleHarley DavidsonFXFBS Softail Fat Bob 1142020114 CI1
    MotorcycleHarley DavidsonFXFBS Softail Fat Bob 1142021114 CI1
    MotorcycleHarley DavidsonFXFBS Softail Fat Bob 1142022114 CI1
    MotorcycleHarley DavidsonFXFBS Softail Fat Bob 1142023114 CI1
    MotorcycleHarley DavidsonFXLRS Softail Low Rider S2020114 CI1
    MotorcycleHarley DavidsonFXLRS Softail Low Rider S2021114 CI1
    MotorcycleHarley DavidsonFXLRS Softail Low Rider S2022117 CI1
    MotorcycleHarley DavidsonFXLRS Softail Low Rider S2023117 CI1
    MotorcycleHarley DavidsonFXLRST Softail Low Rider ST2022117 CI1
    MotorcycleHarley DavidsonFXLRST Softail Low Rider ST2023117 CI1


    This product was added to our catalog on Thursday 22 February, 2024.




    Copyright © 2025 Starcycle Powered by Zen Cart.
    Your IP Address is: 18.216.21.235
    Parse Time: 1.653 - Number of Queries: 153 - Query Time: 0.044513857406617