910-0684A 114" to 128" big bore conversion cylinder & piston kit
incl. VAT
Chapter members save 1% · Sign in for member pricing
Estimated delivery: 3–15 working days
Authorised
Iron City Dealer
14-Day Returns
Easy & hassle-free
Secure Checkout
256-bit encryption
Free UK Delivery
On orders over £100
Specifications
- Brand
- S&S
- Part Number
- 910-0684A
- OEM Reference
- —
- Pack Quantity
- Sold as kit
- Category
- Cylinder And Piston Kits
- VAT Rate
- 20%
About This Product
S&S 114 inch to 128 inch big bore conversion cylinder and piston kit. Fits 2017 to 2025 Milwaukee-Eight 114 inch engines. Black wrinkle cylinders with highlighted fins. Forged 4.250 inch bore pistons and the stock 4.5 inch stroke give 2092cc. 11:1 compression ratio with stock heads. No case boring or flywheel rebalancing. Gaskets and hardware included. S&S suggests their high-strength head bolts.
Manufacturer part number: 910-0684A.
Fitment
38 models17-25 114" M8
Police 8 models
| Brand | Year | Model |
|---|---|---|
| Harley-Davidson | 2019–2020 | Electra Glide Standard Police FLHTP |
| Harley-Davidson | 2025 | Police Electra Glide FLHTP |
| Harley-Davidson | 2021–2024 | Police Electra Glide FLHTP |
| Harley-Davidson | 2025 | Police Road Glide FLTRXP |
| Harley-Davidson | 2024 | Police Road Glide FLTRXP |
| Harley-Davidson | 2025 | Police Road King FLHP |
| Harley-Davidson | 2021–2024 | Police Road King FLHP |
| Harley-Davidson | 2019–2020 | Road King Police FLHP |
Softail 11 models
| Brand | Year | Model |
|---|---|---|
| Harley-Davidson | 2018 | Breakout 114 Anniversary FXBRS |
| Harley-Davidson | 2018–2022 | Breakout 114 FXBRS |
| Harley-Davidson | 2019 | FXDR 114 FXDRS |
| Harley-Davidson | 2018 | Fat Boy 114 Anniversary FLFBS |
| Harley-Davidson | 2018–2024 | Fat Boy 114 FLFBS |
| Harley-Davidson | 2018 | Heritage Classic 114 Anniversary FLHCS |
| Harley-Davidson | 2018–2024 | Heritage Classic 114 FLHCS |
| Harley-Davidson | 2023 | Heritage Classic Anniversary FLHCSANV |
| Harley-Davidson | 2024 | Hydra-Glide Revival FLI |
| Harley-Davidson | 2020–2021 | Low Rider S FXLRS |
| Harley-Davidson | 2021–2024 | Street Bob 114 FXBBS |
Touring 12 models
| Brand | Year | Model |
|---|---|---|
| Harley-Davidson | 2023 | Electra Glide Highway King FLHFB |
| Harley-Davidson | 2021 | Revival FLH |
| Harley-Davidson | 2020–2024 | Road Glide Limited FLTRK |
| Harley-Davidson | 2019–2023 | Road Glide Special FLTRXS |
| Harley-Davidson | 2019 | Road Glide Ultra FLTRU |
| Harley-Davidson | 2025 | Road King Special FLHRXS |
| Harley-Davidson | 2019–2024 | Road King Special FLHRXS |
| Harley-Davidson | 2023 | Street Glide Anniversary FLHXSANV |
| Harley-Davidson | 2019–2023 | Street Glide Special FLHXS |
| Harley-Davidson | 2019–2023 | Ultra Limited FLHTK |
| Harley-Davidson | 2019 | Ultra Limited Low FLHTKL |
| Harley-Davidson | 2019–2022 | Ultra Limited Shrine Edition FLHTK |
Trike 7 models
| Brand | Year | Model |
|---|---|---|
| Harley-Davidson | 2025 | Freewheeler FLRT |
| Harley-Davidson | 2019–2024 | Freewheeler FLRT |
| Harley-Davidson | 2025 | Road Glide 3 FLTRT |
| Harley-Davidson | 2023–2024 | Road Glide 3 FLTRT |
| Harley-Davidson | 2025 | Tri Glide ULTRA FLHTCUTG |
| Harley-Davidson | 2023 | Tri Glide Ultra Anniversary FLHTCUTGANV |
| Harley-Davidson | 2019–2023 | Tri Glide Ultra FLHTCUTG |
Planning other changes? Find your model in the bike customiser.
Related Products
View all →
S&S
88" to 100" conversion cylinder & piston kit. Silver
S&S
107" to 124" big bore conversion cylinder & piston kit
S&S
129" big bore kit. Black cylinders
S&S
883-1200 Hooligan big bore cyl. & piston kit
S&S
96"/103" to 110" conversion cylinder & piston kit
More from S&S
View all →
Rear belt XN7 carbon cord. 14mm, 1-1/8", 130t
1/8-27 NPT allen pipe plug
Non-adj. aluminum pushrod set for Knuckle
Adapter for screw-on oil filter
Pinion gear L77-89. Green
Pinion gear 54-77. White
92-99 crankcase assembly, STD bore. Black
Flywheel assembly for 124" T-series 4-1/8" bore engines
Who are we? Leeds Harley-Davidson - Iron City Motorcycles
This product is fulfilled by Iron City Motorcycles, Leeds' authorised Harley-Davidson® dealer, serving the UK with a full range of Genuine Motorclothes®, dealer merchandise, and official Harley-Davidson parts & accessories — available for UK and international delivery.
From OEM Parts to retro lifestyle wear to aftermarket stockits we have what you need to keep you riding all year round.
Use our official OEM parts finder to browse our full Genuine Harley-Davidson® Parts and our associated approved aftermarket catalogues.