✓ VERIFIED
Sep 26, 2019
Really nice kit great directions for install and ring gap. Follow the directions and you can't go wrong..
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S&S CYCLE
SKU: T14-852171
S&S Cycle 136 Cubic Inch Cylinder & Piston Kit - Harley Twin Cam
$5.095.000,00
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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 Twin Cam into a torque monster with the S&S Cycle 136 cubic inch cylinder and piston kit. This complete top-end package delivers massive displacement and power gains, designed for riders who demand serious performance from their V-twin. It's engineered to integrate seamlessly with your existing crankcases, simplifying the upgrade process.
Why riders pick this
- Massive 136 cubic inch displacement upgrade
- 4.320-inch bore for significant power gains
- Works with stock crankcases, no machining needed
- Retains stock engine height for easy installation
- Includes MLS head gaskets for a secure seal
- Powder coat finish matches factory components
The S&S Cycle 136 cubic inch cylinder and piston kit is engineered to provide a significant boost in power and displacement for your Harley Twin Cam. With a generous 4.320-inch bore, this kit is designed to work with an S&S 4 5/8-inch stroker crank, instantly upgrading your engine's capacity without requiring any machining to your stock crankcases. This means less downtime and a more straightforward installation, getting you back on the road with more horsepower and torque.
Bolt-On Big Power
- Achieve 136 cubic inches of displacement with a 4.320-inch bore
- Designed to work with S&S 4 5/8-inch stroker cranks
- No machine work required for stock crankcases
- Maintains stock engine height for easy fitment
- Includes multi-layered steel head gaskets for a reliable seal
- Factory-matched powder coat finish for a clean look
Engineered for Performance and Simplicity
This S&S Cycle kit is more than just a displacement upgrade; it's a complete solution for enhancing your Harley's engine performance. The carefully selected components ensure durability and a perfect fit, maintaining the integrity of your engine while delivering a substantial power increase. Ideal for riders looking to maximize their V-twin's potential without extensive custom fabrication, this kit is a direct path to a more exhilarating riding experience.
Specifications
- Brand: S&S Cycle
- Manufacturer Part #: 910-0850A
- Displacement: 136 cubic inches
- Bore: 4.320 in.
- Weight: 29.75 lb
- Category: Engine Components / Piston Sets - Powersports
- Country of Origin: USA
Common questions
Does this kit require machining my crankcases?
No, this S&S Cycle kit is designed to work with your stock Harley crankcases without any modifications, provided you use the specified S&S 4 5/8-inch stroker crank.
What crankshaft is needed for this kit?
This S&S Cycle cylinder and piston kit requires an S&S 4 5/8-inch stroker crankshaft (part #ssc320-0605) to achieve the full 136 cubic inch displacement.
Will this kit change my engine's external dimensions?
No, the design of this S&S Cycle kit ensures that your engine's external height remains stock, allowing for compatibility with your existing frame and components.
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 | T14-852171 |
| WEIGHT | 29.75 lb |
Please contact us to confirm fitment for your specific motorcycle, or check the product title for compatibility notes.
CUSTOMER REVIEWS
4.88
8 RATINGS
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✓ VERIFIED
Apr 26, 2022
Excellent service and pricing im very satisfied
✓ VERIFIED
Sep 26, 2019
Better than OEM.. can't go wrong.
✓ VERIFIED
Mar 30, 2026
Very happy with this kit
Simple, easy kit.
✓ VERIFIED
Mar 29, 2026
SMS makes great aftermarket upgrades
✓ VERIFIED
Oct 24, 2025
👍👍 For fast delivery
Parts came just like as expected. They look great! Can't wait to install these bad boys along with a few other parts.