S&S Cycle 3-1/2" Bore Cylinder & Piston Kit Wrinkle Black - Harley Sportster
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.
Transform your Harley Sportster's engine with the S&S Cycle 3-1/2" Bore Cylinder and Piston Kit. This kit provides the foundation for a significant displacement increase, delivering more torque and horsepower. Finished in wrinkle black, these cylinders also add a custom aesthetic to your V-twin powerplant.
Why riders pick this
- Increases displacement potential for more power
- 3-1/2" bore diameter
- Wrinkle black finish for a custom engine aesthetic
- High-quality construction for durability
- Forms the foundation of a performance engine build
Designed for Harley Sportster models, this S&S Cycle cylinder and piston kit is a core component for performance builds. The 3-1/2" bore cylinders are engineered to accommodate larger pistons, allowing for increased engine displacement and a substantial boost in power output. Each cylinder features a durable wrinkle black finish, providing a stealthy, custom look that complements any performance build.
Engineered for Performance and Durability
- 3-1/2" bore diameter for increased displacement potential
- Durable wrinkle black finish for a custom look
- Constructed from high-quality materials for longevity
- Requires final honing for precise piston fitment
The Foundation for Your Performance Build
This kit provides the robust cylinders needed for a serious Sportster engine upgrade. While the cylinders ship slightly under-bored, they are ready for final honing to achieve the perfect piston-to-cylinder wall clearance, ensuring optimal performance and reliability. Pair these cylinders with your chosen S&S Cycle pistons, cams, and a proper dyno tune to unlock the full potential of your Sportster engine.
Specifications
- Brand: S&S Cycle
- Manufacturer Part #: 910-0695
- Bore Diameter: 3-1/2 inches
- Cylinder Length: 4.650 inches
- Finish: Wrinkle black
- Weight: 22 lb
- Category: Engine Components / Piston Sets - Powersports
Common questions
Do these cylinders come with pistons?
No, this kit includes only the cylinders. You will need to select pistons separately to match your specific displacement and compression ratio goals for your Sportster build.
Are these cylinders ready to bolt on?
The cylinders arrive slightly under-bored. They require final honing to precisely match your chosen pistons before installation to ensure proper fitment and optimal engine performance.
Will this kit fit my Sportster?
This kit is designed for a wide range of Harley-Davidson Sportster models. Please use the 'Shop by Bike' tool to confirm exact fitment for your specific year and model before ordering.
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 | T14-662665 |
| WEIGHT | 22.0 lb |
