Description
If you’re serious about street performance, the S&S CYCLE Motor Install Kit delivers the displacement and compression ratio that separates genuine power from promises. This 124-cubic-inch engine combines purpose-built internal components with street-friendly engineering, designed to bolt into your FXD platform without requiring a complete fuel or ignition system overhaul. The Black Edition aesthetic pairs aggressive performance with a refined look that doesn’t compromise on what matters—real horsepower and reliability.
What sets this engine apart is the attention to detail in the cylinder head machining. S&S engineered these heads to work seamlessly with stock-length intake manifolds, meaning you’re not forced into expensive custom fabrication. The high-flow oil pump and easy-start cam profile keep things manageable for street riding while the 10.8:1 compression ratio ensures you’re extracting maximum performance from modern fuel.
- Displacement: 124 cubic inches
- Bore: 4 1/8″
- Stroke: 4 5/8″
- Compression ratio: 10.8:1
- Piston type: Forged flat-top
- Camshaft: 640 profile
- Cylinder heads: Super Stock, 99-05 style
- Oil pump: High-flow design
- Air system: Stock-compatible breathing
- Finish: Gloss black covers
- Fitment: FXD applications
- Installation: Bolt-on engine
- Origin: Made in U.S.A.
- Note: 06+ models require offset flanges
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