S&S Cycle 4.250-inch Bore Front Cylinder Black Granite Unhoned - 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 specifically designed for 2017 and newer Harley-Davidson Milwaukee-Eight (M8) models, featuring a substantial 4.250-inch bore. Crafted from cast iron with a Black Granite finish, it arrives unhoned, providing engine builders with the flexibility for precise, custom honing during engine assembly.
Why riders pick this
- 4.250-inch bore for increased displacement
- Unhoned finish allows for custom precision honing
- Durable Black Granite cast iron construction
- Designed for 2017+ Milwaukee-Eight (M8) engines
For V-twin enthusiasts and professional builders looking to customize their Milwaukee-Eight engine's bore, this S&S Cycle front cylinder offers a strong foundation. The unhoned finish is a key feature, allowing for final honing to exact specifications that perfectly match your chosen piston and ring combination. This precision ensures optimal ring seal and maximizes the longevity and performance of your high-output M8 engine.
Precision Engineering for Custom M8 Builds
- Features a generous 4.250-inch bore for significant displacement increases
- Supplied unhoned, ready for custom honing to precise specifications
- Durable Black Granite cast iron construction for reliability
- Specifically designed for 2017 and newer Milwaukee-Eight (M8) models
The Builder's Choice for Milwaukee-Eight Performance
This front cylinder is ideal for those who demand ultimate control over their engine build. The ability to custom hone means you can achieve the tightest possible tolerances, which translates directly to improved compression and reduced oil consumption. It's a premium component for anyone serious about extracting maximum power and durability from their Milwaukee-Eight platform, ensuring your custom M8 project starts with the right parts.
Specifications
- Brand: S&S Cycle
- Manufacturer Part #: 910-0735
- Bore Size: 4.250 inches
- Finish: Black Granite, unhoned
- Position: Front cylinder
- Weight: 1 lb
- Category: Engine Components / Piston Sets - Powersports
Common questions
What year Harley-Davidson models does this cylinder fit?
This S&S Cycle front cylinder is engineered exclusively for 2017 and newer Harley-Davidson Milwaukee-Eight (M8) models. It will not fit Twin Cam or older engines.
Why does this cylinder come unhoned?
The unhoned finish allows engine builders to precisely hone the cylinder to exact specifications, ensuring an optimal ring seal and longevity for their specific piston and ring combination during a custom build.
Is this a complete piston kit, or just the cylinder?
This product is for the front cylinder only. Pistons and other components for a complete bore kit or engine build must be purchased separately.
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 | T14-662017 |
| WEIGHT | 1.0 lb |