S&S Cycle 136 Cubic Inch 4.320" Bore Cylinder & Piston Kit - Harley-Davidson
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.
Unlock massive displacement and power with the S&S Cycle 136 Cubic Inch Cylinder and Piston Kit for Harley-Davidson. This kit delivers a significant bolt-on displacement increase with a 4.320-inch bore, transforming your V-twin's performance. Engineered to retain stock engine height and work with existing crankcases, it offers a straightforward path to serious power.
Why riders pick this
- 136 cubic inch displacement for massive power
- 4.320-inch bore for significant upgrade
- Retains stock engine height and crankcases
- Includes MLS head gaskets for strong seal
- Powder coat finish matches factory look
- Includes S&S Cam Cover Badge
For riders chasing maximum cubic inches and the raw power that comes with it, the S&S Cycle 136 cubic inch kit is a game-changer. This comprehensive cylinder and piston kit is designed to provide a substantial displacement upgrade without requiring extensive and costly engine modifications. It's a testament to S&S Cycle's engineering prowess, delivering race-bred performance in a package that's accessible for serious street and touring applications.
Big Power, Simplified Install
- Achieves 136 cubic inch displacement with a 4.320-inch bore
- Powder coat finish seamlessly matches factory engine appearance
- Includes MLS (Multi-Layer Steel) head gaskets for a robust seal
- Retains stock engine height and works with factory crankcases
- Includes an S&S Cam Cover Badge to show off your upgrade
The Ultimate Displacement Upgrade
This S&S Cycle kit is engineered to make big power gains as simple as possible. By retaining your original engine serial numbers and working with stock crankcases, it minimizes the complexity and cost often associated with large displacement upgrades. Pair this kit with a performance cam and a proper dyno tune to fully realize the incredible potential of 136 cubic inches on your Harley-Davidson.
Specifications
- Brand: S&S Cycle
- Manufacturer Part #: 910-0850
- Displacement: 136 cubic inches
- Bore: 4.320"
- Weight: 29.75 lb
- Category: Engine Components / Piston Sets - Powersports
Common questions
Will this 136 cubic inch kit require internal engine modifications beyond installation?
No, this S&S Cycle kit is designed to work with stock crankcases and retains original engine height, minimizing the need for additional internal machine work.
Do I need to change my engine serial number after installing this kit?
No, the original engine serial numbers are retained with the installation of this S&S Cycle 136 cubic inch cylinder and piston kit.
What components are included in this S&S Cycle 136 cubic inch kit?
The kit includes cylinders, pistons, MLS head gaskets, and an S&S Cam Cover Badge, providing a complete solution for the displacement upgrade.
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 | T14-662036 |
| WEIGHT | 29.75 lb |