✓ VERIFIED
Sep 26, 2019
Really nice kit great directions for install and ring gap. Follow the directions and you can't go wrong..
S&S CYCLE
SKU: T14-662690
S&S Cycle 3-9/16" Bore Cylinder & Piston Kit Silver - Harley Sportster
$735.95
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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.
Upgrade your Harley Sportster with the S&S Cycle 3-9/16" Bore Cylinder and Piston Kit, designed to deliver a significant boost in displacement and power. This direct bolt-on kit features silver-finished cylinders and matched pistons, providing both performance gains and a classic aesthetic.
Why riders pick this
- Increases displacement for more power
- 3-9/16" bore cylinders with matched pistons
- Classic silver finish
- High-quality S&S Cycle components
- Direct bolt-on upgrade for Sportster
The S&S Cycle 3-9/16" Bore Cylinder and Piston Kit is engineered for Harley-Davidson Sportster models, offering a robust foundation for serious engine performance. By increasing the bore, this kit significantly enhances your engine's displacement, translating into greater horsepower and torque across the RPM range. The clean silver finish of the cylinders offers a traditional look that complements any Sportster build, whether you're going for a performance sleeper or a polished custom.
Performance and Classic Style
- 3-9/16" bore cylinders for increased engine displacement
- 4.650" cylinder length for precise fitment
- Includes matched piston set for optimal performance
- Classic silver finish for a timeless look
- Engineered for a direct bolt-on upgrade
Maximizing Your Sportster's Potential
This cylinder and piston kit is a crucial step towards building a high-performance Sportster engine. While it's designed for a direct fit, proper engine assembly techniques and precise torque specifications are essential for reliable operation. For best results, pair this kit with complementary performance upgrades like an S&S camshaft and a high-flow intake, followed by a professional dyno tune to fully optimize your bike's air/fuel mixture and unlock its maximum potential.
Specifications
- Brand: S&S Cycle
- Manufacturer Part #: 910-0693
- Bore: 3-9/16"
- Cylinder Length: 4.650"
- Weight: 24 lb
- Category: Engine Components / Piston Sets - Powersports
Common questions
Will this kit fit my XR1200?
No, this S&S Cycle cylinder and piston kit is not compatible with XR1200 models. Please consult S&S Cycle directly for XR1200-specific engine components.
Will I need a tuner or carburetor changes after installation?
Yes, engine modifications of this magnitude typically require either a carburetor rejetting or EFI tuning to ensure proper air/fuel ratios and to optimize the performance gains from the increased displacement.
Is professional installation required for this kit?
Yes, cylinder and piston installation involves significant engine disassembly and requires specialized tools and knowledge of proper torque specifications. Professional installation is highly recommended.
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 | T14-662690 |
| WEIGHT | 24.0 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.
