Product Details
S&S 124" Big Bore Kit For Harley 107" Milwaukee Eight
Upgrade your 107" M8 motor to the largest bore size possible, without required machining of your cases. This is as simple as big power gets, with everything necessary for installation included.
Features:
- Bolt-on kit, the largest cylinder bore possible for 107" M8 motors without required machining of the crankcases
- 4.250" bore, 4.375" stroke
- 11:1 forged pistons with rings, pins and clips
- All gaskets and hardware required for installation included
- Wrinkle black finish
- Made in the USA

Product Style | RevZilla Item # | Store Sku | MFR. Product # | Availability |
---|---|---|---|---|
Product Style Non-Highlighted Fins | RevZilla Item #1591350 | Store Sku | MFR. Product #910-0681 | AvailabilityOut of Stock |
Product Style Highlighted Fins | RevZilla Item #1591351 | Store Sku | MFR. Product #910-0625 | AvailabilityIn Stock: Ships within 24 hours |
- Harley Davidson
- Electra Glide Standard FLHT 2019, 2020, 2021, 2022
- Electra Glide Ultra Classic FLHTCU/I 2017, 2018, 2019
- Electra Glide Ultra Limited FLHTK 2017-2024
- Electra Glide Ultra Limited Low FLHTKL 2017, 2018, 2019
- Road Glide FLTRX 2017-2023
- Road Glide Limited FLTRK 2020, 2021, 2022, 2023, 2024
- Road Glide Special FLTRXS 2017-2023
- Road Glide ST FLTRXST 2022, 2023
- Road Glide Ultra FLTRU 2017, 2018, 2019
- Road King FLHR/I 2017-2022
- Road King Special FLHRXS 2017-2025
- Softail Breakout FXBR 2018, 2019
- Softail Deluxe FLDE 2018, 2019, 2020
- Softail Fat Bob FXFB 2018, 2019
- Softail Fat Boy FLFB 2018, 2019
- Softail Heritage Classic 114 FLHCS 2020, 2021, 2022, 2023, 2024
- Softail Heritage Classic FLHC 2018, 2019, 2020, 2021, 2025
- Softail Low Rider FXLR 2018, 2019, 2020
- Softail Slim FLSL 2018, 2019, 2020, 2021
- Softail Sport Glide FLSB 2018, 2019, 2020, 2021
- Softail Standard FXST 2020, 2021, 2022, 2023, 2024
- Softail Street Bob 114 FXBBS 2021, 2022, 2023, 2024
- Softail Street Bob FXBB 2018, 2019, 2020, 2025
- Street Glide FLHX/I 2017-2023
- Street Glide Special FLHXS 2017-2023
- Street Glide ST FLHXST 2022, 2023
Related Videos
The Indian Larry Twisted Frame Chopper | J&P Custom Motorcycle Builds
150-Horsepower Harley-Davidson | J&P: Custom Motorcycle Builds
124 Cubic Inch Twin Cam FXR | J&P: Custom Motorcycle Builds
The First 8 Things You Should Change When Buying a Harley Davidson