WK2787 107" to 124" big bore piston conversion kit
incl. VAT
Chapter members save 15% · 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
- Wiseco
- Part Number
- WK2787
- OEM Reference
- —
- Pack Quantity
- Each
- Category
- Piston Kits
- VAT Rate
- 20%
About This Product
Wiseco big bore piston conversion kit for 107-inch to 124-inch Milwaukee-Eight builds. This kit fits 2017 to 2024 107-inch M8 models already running a 4.25-inch big bore cylinder kit. The box contains pistons, rings, wristpins, and retaining rings. Flywheel re-balancing is not required. Fit these when you are stepping up displacement and the 4.25-inch cylinders are already in place. Check your bore size before ordering.
Manufacturer part number: WK2787.
Fitment
35 models17-24 107" M8 models with 4.25" big bore cylinder kit
Softail 16 models
| Brand | Year | Model |
|---|---|---|
| Harley-Davidson | 2018–2020 | Deluxe FLDE |
| Harley-Davidson | 2019–2024 | Fat Bob 114 FXFBS |
| Harley-Davidson | 2018 | Fat Boy 114 Anniversary FLFBS |
| Harley-Davidson | 2018–2024 | Fat Boy 114 FLFBS |
| Harley-Davidson | 2018–2019 | Fat Boy FLFB |
| Harley-Davidson | 2018 | Heritage Classic 114 Anniversary FLHCS |
| Harley-Davidson | 2018–2024 | Heritage Classic 114 FLHCS |
| Harley-Davidson | 2018–2021 | Heritage Classic FLHC |
| Harley-Davidson | 2018 | Low Rider FXLR |
| Harley-Davidson | 2020–2024 | Low Rider S FXLRS |
| Harley-Davidson | 2022–2024 | Low Rider ST FXLRST |
| Harley-Davidson | 2018–2021 | Slim FLSL |
| Harley-Davidson | 2019 | Softail Slim FLSL |
| Harley-Davidson | 2020–2023 | Softail Standard FXST |
| Harley-Davidson | 2018–2024 | Sport Glide FLSB |
| Harley-Davidson | 2018–2020 | Street Bob FXBB |
Touring 15 models
| Brand | Year | Model |
|---|---|---|
| Harley-Davidson | 2017–2018 | Electra Glide Ultra Classic FLHTCU |
| Harley-Davidson | 2017–2024 | Road Glide FLTRX |
| Harley-Davidson | 2021–2024 | Road Glide Limited FLTRK |
| Harley-Davidson | 2017–2023 | Road Glide Special FLTRXS |
| Harley-Davidson | 2017–2019 | Road King FLHR |
| Harley-Davidson | 2017–2024 | Road King Special FLHRXS |
| Harley-Davidson | 2018 | Street Glide Anniversary FLHX |
| Harley-Davidson | 2017–2024 | Street Glide FLHX |
| Harley-Davidson | 2018 | Street Glide Special Anniversary FLHXS |
| Harley-Davidson | 2017–2023 | Street Glide Special FLHXS |
| Harley-Davidson | 2018 | Ultra Limited Anniversary FLHTK |
| Harley-Davidson | 2017–2024 | Ultra Limited FLHTK |
| Harley-Davidson | 2017–2019 | Ultra Limited Low FLHTKL |
| Harley-Davidson | 2018–2023 | Ultra Limited Shrine Edition FLHTK |
| Harley-Davidson | 2017 | Ultra Limited Shrine FLHTK |
Trike 4 models
| Brand | Year | Model |
|---|---|---|
| Harley-Davidson | 2017–2023 | Freewheeler FLRT |
| Harley-Davidson | 2023–2024 | Road Glide 3 FLTRT |
| Harley-Davidson | 2018 | Tri Glide Ultra Anniversary FLHTCUTG |
| Harley-Davidson | 2017–2024 | Tri Glide Ultra FLHTCUTG |
Planning other changes? Find your model in the bike customiser.
Related Products
View all →More from Wiseco
View all →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.