709141 107" to 124" 4.25" big bore conversion cylinders for M8
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Specifications
- Brand
- MCS
- Part Number
- 709141
- OEM Reference
- 709141
- Pack Quantity
- Sold as set
- Category
- Cylinders
- VAT Rate
- 20%
About This Product
Black with highlighted fins. This is a quality 4.25" bolt-on big bore cylinder kit for 107" M8 models with stock 3.937" bore x 4.375" stroke. Kit can be used with a 4.25" Wiseco big bore piston & ring kit. Cylinders include dowel pins and are marked for correct front/rear installation. Capacity will increase from stock 107" (106.52" / 1746cc) to a hefty 124" (124.13 / 2034cc) but still installs without crankcase machining. Flywheel re-balancing is not required. Compression ratio is 1:11 and is compatible with the stock camshaft. Includes installation instructions. Note: Order 576555 Wiseco 4.25" bore conversion piston & ring kit & 576556 Wiseco gasket kit separately.
Manufacturer part number: 709141.
Fitment
25 models17-24 107" M8
Softail 8 models
| Brand | Year | Model |
|---|---|---|
| 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 | Heritage Classic 114 Anniversary FLHCS |
| Harley-Davidson | 2018–2023 | Heritage Classic 114 FLHCS |
| Harley-Davidson | 2020–2024 | Low Rider S FXLRS |
| Harley-Davidson | 2022–2024 | Low Rider ST FXLRST |
| Harley-Davidson | 2018–2024 | Sport Glide FLSB |
Touring 13 models
| Brand | Year | Model |
|---|---|---|
| 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 | 2017–2024 | 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 | 2017–2023 | Tri Glide Ultra FLHTCUTG |
Planning other changes? Find your model in the bike customiser.
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