S&S Cycle 4.250" Front Cylinder Black Granite - Harley Milwaukee-Eight
About S&S Cycle
S&S Cycle has built American V-twin performance parts in Viola, Wisconsin since 1958 — flywheels, carburetors, cams, cylinder heads and complete crate engines. When a Harley owner talks about a 124, a 128 or a 131 build, they are usually talking about S&S. Few names carry more weight with engine builders in this space.
This S&S Cycle front cylinder is engineered for 2017 and newer Harley-Davidson Milwaukee-Eight (M8) engines, featuring a substantial 4.250-inch bore. Finished in a striking black granite with highlight accents, it provides a solid foundation for performance builds. Shipped unhoned, it's ready for your engine builder to precisely hone to your specific piston and ring package.
Why riders pick this
- 4.250-inch bore for 2017+ Milwaukee-Eight engines
- Unhoned for custom precision honing
- Black granite finish with highlight accents
- Front cylinder for big-bore M8 builds
- Robust construction for high-performance applications
When chasing serious displacement and power from your Milwaukee-Eight, starting with quality components is non-negotiable. This S&S Cycle front cylinder delivers the robust construction and precise machining needed for high-performance M8 builds. Its unhoned state gives your engine builder the flexibility to achieve optimal piston-to-wall clearance, ensuring maximum durability and output. The black granite finish with highlight provides a custom look that stands out.
Precision Engineering for M8 Performance
- 4.250-inch bore designed for 2017+ Milwaukee-Eight engines
- Ships unhoned, allowing for custom final honing to exact specifications
- Striking black granite finish with highlight accents
- Robust casting built to withstand increased engine demands
Building a Big-Bore M8
This S&S Cycle front cylinder is an essential component for any Milwaukee-Eight big-bore or stroker project. It's crucial to pair this cylinder with matching pistons and a complete gasket set engineered for this larger bore size. Professional installation and precise honing are recommended to ensure proper fitment and long-term reliability for your high-performance M8 build. Always confirm compatibility with your chosen piston kit.
Specifications
- Brand: S&S Cycle
- Manufacturer Part #: 910-0740
- Bore Size: 4.250 in
- Weight: 11.8 lb
- Finish: Black granite with highlight
- Category: Engine Components / Piston Sets - Powersports
Common questions
Is this cylinder ready to install out of the box?
No, this cylinder ships unhoned. It requires final honing by a qualified engine builder to match your specific pistons and achieve the correct clearances before assembly.
What bore size is this cylinder?
This S&S Cycle cylinder features a 4.250-inch bore, making it suitable for large displacement builds on 2017 and newer Milwaukee-Eight engines.
Will this cylinder fit my Twin Cam or Evolution engine?
No, this cylinder is specifically designed for 2017 and newer Harley-Davidson Milwaukee-Eight engines only. It will not fit Twin Cam or Evolution platforms due to different dimensions and design.
Ordering from Vtwinbikers
- Brand new, sourced through authorized US distribution — never used, never grey-market.
- Not sure it fits? Use Shop by Bike to filter by your year and model, or email us and we will confirm before you order.
- Harley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.
| BRAND | S&S Cycle |
| TYPE | Piston Sets - Powersports |
| SKU | T14-662019 |
| WEIGHT | 11.8 lb |