136" Big Bore Cylinder Kit — 4.320" bore, 4.625" stroke

S&S Cycle 136" Big Bore Cylinder Kit — 4.320" bore, 4.625" stroke

Fits: Softail 2018-2025 · Touring 2023-2025 · Trike 2017-2025 · CVO 2020-2022

S&S CYCLE
0931-1167
910-0849

Bolt-on kit increases displacement without crankcase machining; retains engine serial numbers and stock height.

Includes MLS head gaskets and cam cover badge; compatible stroker flywheel sold separately. Made in the USA.

Our price €1,647.71
RRP: €1,985.31RRP = manufacturer's recommended retail price
VAT included
Currently unavailable See available alternatives below

Available alternatives

Description

136" Big Bore Cylinder Kit is a bolt-on upgrade that delivers the largest cylinder bore available without machining the crankcases.

Includes MLS multi-layer steel head gaskets and a cam cover badge, retains original engine serial numbers, and preserves stock engine height.

A compatible stroker flywheel is required and sold separately; the kit is made in the USA for precise fit and durable finish.

Fitment

Model Years
Harley Davidson
FLDE 1750 ABS (Softail Deluxe 107) 2018–2020
FLFB 1750 ABS (Softail Fat Boy 107) 2018–2020
FLFBS 1868 ABS (Softail Fat Boy 114) 2019–2024
FLFBS 1868 ABS (Softail Fat Boy Anniversary (ANX) 114) 2018
FLFBS 1923 ABS (Softail Fat Boy 117) 2025
FLHC 1750 ABS (Softail Heritage Classic 107) 2020–2022
FLHCS 1868 ABS (Softail Heritage Classic 114) 2020–2024
FLHCS 1868 ABS (Softail Heritage Classic Anniversary 114) 2018
FLHCS 1923 ABS (Softail Heritage Classic 117) 2025
FLHFB 1868 ABS (Electra Glide Highway King 114) 2023
FLHRXS 1868 ABS (Road King Special 114) 2025
FLHTCUTG 1750 (Tri Glide Ultra Anniversary 107) 2018
FLHTCUTG 1750 ABS (Tri Glide Ultra 107) 2019
FLHTCUTG 1868 ABS (Tri Glide Ultra 114) 2020–2025
FLHTCUTGSE 1923 ABS (Tri Glide CVO 117) 2022
FLHTCUTGSE 1923 ABS (Tri Glide Ultra CVO 117) 2020–2021
FLHX 1923 ABS (Street Glide 117) 2024–2025
FLI 1868 ABS (Hydra-Glide Revival 114) 2024
FLRT 1750 (Freewheeler 107) 2017–2018
FLRT 1750 ABS (Freewheeler 107) 2019
FLRT 1868 ABS (Freewheeler 114) 2020–2025
FLSB 1750 ABS (Softail Sport Glide 107) 2018–2024
FLSL 1750 ABS (Softail Slim 107) 2018, 2021
FLSTFI 1923 ABS (Softail Fat Boy Gray Ghost 117) 2025
FLTRT 1868 ABS (Road Glide 3 114) 2023–2025
FLTRX 1923 ABS (Road Glide 117) 2024–2025
FXBB 1923 ABS (Softail Street Bob 117) 2025
FXBBS 1868 (Softail Street Bob 114) 2021
FXBBS 1868 ABS (Softail Street Bob 114) 2021–2024
FXBR 1750 ABS (Softail Breakout 107) 2018–2020

+ 14 more models across 1 make in total.

Part numbers

Manufacturer part number 910-0849
: 0931-1167
Currently unavailable

Data sheet

Type
Big Bore
Units
Kit
Color/Finish
Powder-Coated, Wrinkle Black, Non-Highlighted Fins
Brand
S&S CYCLE
Bore Size
4,320"
Displacement
136"
Stroke Length
4,625"
Compression Ratio
11.0:1
Model Family
CVO
Softail
Touring
Trike

Vehicle Fitments

This product fits the following vehicles. Use the filters below to narrow down the list if needed.

Manufacturer Model Family Year Notes
Harley Davidson Softail Deluxe 107 Softail 2018
Harley Davidson Softail Deluxe 107 Softail 2019
Harley Davidson Softail Deluxe 107 Softail 2020
Harley Davidson Softail Fat Boy 107 Softail 2018
Harley Davidson Softail Fat Boy 107 Softail 2019
Harley Davidson Softail Fat Boy 107 Softail 2020
Harley Davidson Softail Fat Boy Anniversary (ANX) 114 Softail 2018
Harley Davidson Softail Fat Boy 114 Softail 2019
Harley Davidson Softail Fat Boy 114 Softail 2020
Harley Davidson Softail Fat Boy 114 Softail 2021
Harley Davidson Softail Fat Boy 114 Softail 2022
Harley Davidson Softail Fat Boy 114 Softail 2023
Harley Davidson Softail Fat Boy 114 Softail 2024
Harley Davidson Softail Fat Boy 117 Softail 2025
Harley Davidson Softail Heritage Classic 107 Softail 2020
Harley Davidson Softail Heritage Classic 107 Softail 2021
Harley Davidson Softail Heritage Classic 107 Softail 2022
Harley Davidson Softail Heritage Classic Anniversary 114 Softail 2018
Harley Davidson Softail Heritage Classic 114 Softail 2020
Harley Davidson Softail Heritage Classic 114 Softail 2021
Harley Davidson Softail Heritage Classic 114 Softail 2022
Harley Davidson Softail Heritage Classic 114 Softail 2023
Harley Davidson Softail Heritage Classic 114 Softail 2024
Harley Davidson Softail Heritage Classic 117 Softail 2025
Harley Davidson Electra Glide Highway King 114 Touring 2023
Harley Davidson Road King Special 114 Touring 2025
Harley Davidson Tri Glide Ultra Anniversary 107 Trike 2018
Harley Davidson Tri Glide Ultra 107 Trike 2019
Harley Davidson Tri Glide Ultra 114 Trike 2020
Harley Davidson Tri Glide Ultra 114 Trike 2021
Harley Davidson Tri Glide Ultra 114 Trike 2022
Harley Davidson Tri Glide Ultra 114 Trike 2023
Harley Davidson Tri Glide Ultra 114 Trike 2024
Harley Davidson Tri Glide Ultra 114 Trike 2025
Harley Davidson Tri Glide Ultra CVO 117 CVO 2020
Harley Davidson Tri Glide Ultra CVO 117 CVO 2021
Harley Davidson Tri Glide CVO 117 CVO 2022
Harley Davidson Street Glide 117 Touring 2024
Harley Davidson Street Glide 117 Touring 2025
Harley Davidson Hydra-Glide Revival 114 Softail 2024
Harley Davidson Freewheeler 107 Trike 2017
Harley Davidson Freewheeler 107 Trike 2018
Harley Davidson Freewheeler 107 Trike 2019
Harley Davidson Freewheeler 114 Trike 2020
Harley Davidson Freewheeler 114 Trike 2021
Harley Davidson Freewheeler 114 Trike 2022
Harley Davidson Freewheeler 114 Trike 2023
Harley Davidson Freewheeler 114 Trike 2024
Harley Davidson Freewheeler 114 Trike 2025
Harley Davidson Softail Sport Glide 107 Softail 2018
Harley Davidson Softail Sport Glide 107 Softail 2019
Harley Davidson Softail Sport Glide 107 Softail 2020
Harley Davidson Softail Sport Glide 107 Softail 2021
Harley Davidson Softail Sport Glide 107 Softail 2022
Harley Davidson Softail Sport Glide 107 Softail 2023
Harley Davidson Softail Sport Glide 107 Softail 2024
Harley Davidson Softail Slim 107 Softail 2018
Harley Davidson Softail Slim 107 Softail 2021
Harley Davidson Softail Fat Boy Gray Ghost 117 Softail 2025
Harley Davidson Road Glide 3 114 Trike 2023
Harley Davidson Road Glide 3 114 Trike 2024
Harley Davidson Road Glide 3 114 Trike 2025
Harley Davidson Road Glide 117 Touring 2024
Harley Davidson Road Glide 117 Touring 2025
Harley Davidson Softail Street Bob 117 Softail 2025
Harley Davidson Softail Street Bob 114 Softail 2021
Harley Davidson Softail Street Bob 114 Softail 2021
Harley Davidson Softail Street Bob 114 Softail 2022
Harley Davidson Softail Street Bob 114 Softail 2023
Harley Davidson Softail Street Bob 114 Softail 2024
Harley Davidson Softail Breakout 107 Softail 2018
Harley Davidson Softail Breakout 107 Softail 2019
Harley Davidson Softail Breakout 107 Softail 2020
Harley Davidson Softail Breakout 117 Softail 2023
Harley Davidson Softail Breakout 117 Softail 2024
Harley Davidson Softail Breakout 117 Softail 2025
Harley Davidson Softail Breakout Anniversary (ANX) 114 Softail 2018
Harley Davidson Softail Breakout 114 Softail 2019
Harley Davidson Softail Breakout 114 Softail 2020
Harley Davidson Softail Breakout 114 Softail 2021
Harley Davidson Softail Breakout 114 Softail 2022
Harley Davidson Softail King 114 Softail 2019
Harley Davidson Softail King 114 Softail 2020
Harley Davidson Softail Fat Bob 107 Softail 2018
Harley Davidson Softail Fat Bob 107 Softail 2019
Harley Davidson Softail Fat Bob 107 Softail 2021
Harley Davidson Softail Fat Bob 114 Softail 2018
Harley Davidson Softail Fat Bob 114 Softail 2019
Harley Davidson Softail Fat Bob 114 Softail 2020
Harley Davidson Softail Fat Bob 114 Softail 2021
Harley Davidson Softail Fat Bob 114 Softail 2022
Harley Davidson Softail Fat Bob 114 Softail 2023
Harley Davidson Softail Low Rider 107 Softail 2020
Harley Davidson Softail Low Rider S 117 Softail 2022
Harley Davidson Softail Low Rider S 117 Softail 2023
Harley Davidson Softail Low Rider S 117 Softail 2024
Harley Davidson Softail Low Rider S 117 H.O. Softail 2025
Harley Davidson Softail Low Rider ST 117 Softail 2022
Harley Davidson Softail Low Rider ST 117 Softail 2023
Harley Davidson Softail Low Rider ST 117 Softail 2024
Harley Davidson Softail Low Rider ST 117 H.O. Softail 2025
Harley Davidson Softail Standard Softail 2021
Harley Davidson Softail Standard Softail 2020
Harley Davidson Softail Standard Softail 2021
Harley Davidson Softail Standard Softail 2022
Harley Davidson Softail Standard Softail 2023
Harley Davidson Softail Standard Softail 2024