S&S CYCLE M8 Big Bore Kit, 114 to 128, Black with no Highlighting, 4.250 bore x 4.5 stroke - Harley-Davidson '17-'23 - 910-0685
CONFIRM FITMENT BEFORE ORDERING
Please confirm fitment for your bike below as we do not accept returns on parts ordered incorrectly.
Features & Benefits
- Available for 114 M8 models
- Available in both highlighted and non highlighted versions
- 114 to 128" big bore kit
- Wrinkle black finish
- Non-Highlighted Fins
- Bolt on kit. No Machining Required
- includes gaskets and hardware required for installation
- 4.250" bore
- Forged Pistons
- 11:1 compression ratio
***We recommend using S&S Cycle Head Bolts for M8, part number 900-1006 for all big bore applications.
Not recommended for Tri-Glide or other three wheel models including conversion due to lugging nature of these bikes.
NOTE: Not recommended for trike models
- Project requires a skilled technician. It is the responsibility of the person assembling the parts to check all clearances and assembly specifications.
Fitment Guide
| 2023 | Harley-Davidson | FLHFB Electra Glide Highway King | - | - |
| 2023 | Harley-Davidson | FXBR Breakout 117 | - | - |
| 2022-2023 | Harley-Davidson | FXLRS Low Rider S 117 | - | - |
| 2022-2023 | Harley-Davidson | FLHXST Street Glide ST | - | - |
| 2022-2023 | Harley-Davidson | FLTRXST Road Glide ST | - | - |
| 2022-2023 | Harley-Davidson | FXLRST Low Rider ST 117 | - | - |
| 2022-2023 | Harley-Davidson | FLTRKSE CVO Road Glide Limited | - | - |
| 2022 | Harley-Davidson | Softail Street Bob FXBB | - | - |
| 2021-2023 | Harley-Davidson | FXBBS Street Bob 114 | - | - |
| 2021 | Harley-Davidson | FLH Electra Glide Revival | - | - |
| 2020-2023 | Harley-Davidson | FLTRK Road Glide Limited | - | - |
| 2020-2021 | Harley-Davidson | FXLRS Low Rider S 114 | - | - |
| 2019-2022 | Harley-Davidson | FLHT Electra Glide Standard | - | - |
| 2019-2020 | Harley-Davidson | FXDRS FXDR 114 | - | - |
| 2018-2023 | Harley-Davidson | FLHCS Heritage Classic 114 | - | - |
| 2018-2023 | Harley-Davidson | FLFBS Fat Boy 114 | - | - |
| 2018-2023 | Harley-Davidson | FLTRXSE CVO Road Glide | - | - |
| 2018-2021, 2023 | Harley-Davidson | FXFBS Fat Bob 114 | - | - |
| 2018-2021 | Harley-Davidson | FLHC Heritage Classic 107 | - | - |
| 2018-2020 | Harley-Davidson | FXBRS Breakout 114 | - | - |
| 2018-2020 | Harley-Davidson | FXBB Street Bob 107 | - | - |
| 2018-2019 | Harley-Davidson | FXFB Fat Bob 107 | - | - |
| 2018-2019 | Harley-Davidson | FXBR Breakout 107 | - | - |
| 2018-2019 | Harley-Davidson | FLFB Fat Boy 107 | - | - |
| 2017-2023 | Harley-Davidson | FLHXS Street Glide Special | - | - |
| 2017-2023 | Harley-Davidson | FLTRXS Road Glide Special | - | - |
| 2017-2023 | Harley-Davidson | FLHRXS Road King Special | - | - |
| 2017-2023 | Harley-Davidson | FLHTK Ultra Limited | - | - |
| 2017-2023 | Harley-Davidson | FLHX Street Glide | - | - |
| 2017-2023 | Harley-Davidson | FLHXSE CVO Street Glide | - | - |
| 2017-2023 | Harley-Davidson | FLTRX Road Glide | - | - |
| 2017-2023 | Harley-Davidson | Electra Glide Police FLHTPI | - | - |
| 2017-2023 | Harley-Davidson | Road King Police FLHP | - | - |
| 2017-2022 | Harley-Davidson | FLHR Road King | - | - |
| 2017-2021 | Harley-Davidson | FLHTKSE CVO Limited | - | - |
| 2017-2019 | Harley-Davidson | FLHTKL Ultra Limited Low | - | - |
| 2017-2019 | Harley-Davidson | FLHTCU Electra Glide Ultra Classic | - | - |
| 2017-2019 | Harley-Davidson | FLTRU Road Glide Ultra | - | - |
Specs
| BASE COLOR | BLACK |
| COMPRESSION RATIO | 11.0:1 / 11:1 |
| MATERIAL | IRON |
| BORE SIZE | 4.250" / 4,250" |
| COLOR/FINISH | BLACK |
| PRODUCT NAME | CYLINDER KIT |
| STROKE LENGTH | 4-1/2" / 4-1/2" |
| STYLE | BIG BORE |
| UNITS | KIT |
| DISPLACEMENT | 128" |
| RIDING STYLE | STREET |
Delivery Info
Please Note - Warehouse Locations For This Part -
S&S CYCLE M8 Big Bore Kit, 114 to 128, Black with no Highlighting, 4.250 bore x 4.5 stroke - Harley-Davidson '17-'23 - 910-0685
Gold Coast Warehouse- If your parts are in stock at our Gold Coast warehouse at the time of order, they will be shipped within 24hrs.
Supplier Warehouse - 2-3 Week Delivery- If your parts are located at our Supplier Warehouse, Delivery ETA is approx 2-3 weeks, as the parts are likely coming from our USA supplier warehouse. We will notify you once we receive it in Gold Coast warehouse and its on its way to you.