S&S Cycle Cylinder & Piston Kit (No Highlighted Fins) - 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.
Upgrade your Milwaukee-Eight with this S&S Cycle cylinder and piston kit, specifically designed for M8 engines without highlighted fins. This complete top-end assembly bolts directly onto your stock M8 crankcases, significantly increasing displacement and compression for a substantial power boost. It's a straightforward way to enhance your V-twin's performance.
Why riders pick this
- Increases displacement and compression for more power
- Designed for M8 engines without highlighted fins
- Complete cylinder and piston assembly
- Bolt-on installation to stock crankcases
- S&S Cycle quality for durability and performance
This S&S Cycle cylinder and piston kit provides a robust solution for Milwaukee-Eight owners looking to uncork more power from their engine. The complete assembly is engineered for a direct bolt-on installation, simplifying the upgrade process. By increasing both displacement and compression, this kit transforms your M8, delivering a more aggressive throttle response and stronger pull through the RPM range. It's an ideal foundation for a more powerful V-twin build.
Enhanced M8 Performance
- Complete cylinder and piston assembly for M8 engines
- Designed specifically for M8s without highlighted fins
- Increases engine displacement and compression
- Direct bolt-on installation to stock crankcases
- S&S Cycle quality and engineering for reliable power
Building a Better Milwaukee-Eight
This cylinder and piston kit is a core component for any serious Milwaukee-Eight performance build. While it offers a direct fit, professional installation is recommended to ensure proper clearances and assembly. Pair this kit with an S&S cam, a high-flow air cleaner, and a performance exhaust, then complete the package with a custom dyno tune to unleash the full potential of your upgraded M8 engine.
Specifications
- Brand: S&S Cycle
- Manufacturer Part #: 910-1009A
- Category: Engine Components / Piston Sets - Powersports
- Weight: 30 lb
Common questions
Will this kit fit my M8 with highlighted fins?
No, this S&S Cycle kit is specifically designed for Milwaukee-Eight engines without highlighted fins. A different part number is required for M8 blocks that feature highlighted fins.
Do I need to remove the engine from the frame to install this kit?
Yes, cylinder and piston kit installation typically requires removing the engine from the frame and disassembling the top end from the crankcases for proper fitment and assembly.
Is a dyno tune necessary after installing this kit?
Yes, absolutely. Any significant change in engine displacement and compression, like with this kit, requires a professional dyno tune to optimize fuel delivery and ignition timing for peak performance and engine longevity.
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 | T14-871885 |
| WEIGHT | 30.0 lb |