S&S CYCLE SKU: T14-661551

S&S Cycle T124LC 10.2:1 Compression Engine - Harley Touring

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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.

Unleash a new level of performance in your 2007-2016 Harley-Davidson Touring model with the S&S Cycle T124LC Engine. This 124 cubic inch powerhouse features a 10.2:1 compression ratio, specifically engineered to deliver significant increases in horsepower and low-end torque. Built with premium S&S components, it's a direct replacement designed to transform your riding experience.

Why riders pick this

  • 124 cubic inches, 10.2:1 compression for huge power
  • S&S forged rocker arms and TC3 cam plate
  • Gear-drive Easy Start 585 cams for reliable starts
  • Enhanced cooling fins for better heat dissipation
  • Gloss black components for a premium aesthetic

The S&S Cycle T124LC Engine is an all-in-one solution for riders seeking a massive upgrade in power and reliability. Equipped with S&S forged rocker arms, a robust TC3 cam plate, and gear-drive Easy Start 585 cams, this engine ensures easier starting and consistent performance. Its large cooling fins are a deliberate design choice to improve heat dissipation, crucial for high-performance V-twin engines, especially on long rides or in demanding conditions.

Engineered for Maximum Output and Durability

  • 124 cubic inches with a 10.2:1 compression ratio for aggressive power
  • S&S forged rocker arms and TC3 cam plate for enhanced strength
  • Gear-drive Easy Start 585 cams for reliable starting and optimized valve timing
  • Large cooling fins for superior heat management
  • Gloss black rocker covers, gear cover, and tappet blocks for a custom look

Important Fitment and Tuning Notes

This T124LC engine is a direct replacement for 2007-2016 Harley-Davidson Touring models, but it is not compatible with Softail models. Riders of Tri-Glide or other three-wheel models should note that S&S does not recommend compression ratios higher than 10:1 due to the extra lugging loads these bikes experience. A proper dyno tune will be essential to fully realize the engine's potential and ensure its longevity.

Specifications

  • Brand: S&S Cycle
  • Manufacturer Part #: 310-0836A
  • Displacement: 124 cubic inches
  • Compression Ratio: 10.2:1
  • Weight: 180 lb
  • Category: Engine Components / Engines

Common questions

Will this engine fit my 2007-2016 Harley Touring model?

Yes, this S&S Cycle T124LC engine is designed as a direct replacement for 2007-2016 Harley-Davidson Touring models. It is not compatible with Softail models.

Does this engine require a dyno tune?

Yes, installing a high-performance engine like the T124LC absolutely requires a professional dyno tune with appropriate fuel and ignition management to maximize its power, ensure proper running, and maintain engine health.

Is this engine suitable for Tri-Glide models?

S&S does not recommend compression ratios higher than 10:1 for Tri-Glide or other three-wheel models due to the increased lugging loads. This T124LC features a 10.2:1 compression ratio, so it's not recommended for those applications.

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.
BRANDS&S Cycle
TYPEEngines
SKUT14-661551
WEIGHT180.0 lb
Please contact us to confirm fitment for your specific motorcycle, or check the product title for compatibility notes.
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Oct 10, 2025

I have the 124 in a 2002 Harley Davidson Electra glide classic, the best thing I did to my bike was the have this motor installed, the power is A-1 , you can't go wrong with this, I'm very happy with this product by S&S😂💪🏿😎.

— Darrel W