S&S Cycle V111 Evolution Long Block Engine for 1984-1999 Harley-Davidson Evo Big Twin
The V111 is the smart upgrade for riders who want serious power without sacrificing the daily reliability their bike demands. Its square bore-and-stroke design keeps piston speed down, vibration in check, and engine life long — all while delivering 30 percent more horsepower and torque than the stock 80-inch it replaces. Bolt it into your existing chassis with the carb you already own and ride out with a motor that was built to last as hard as it runs.
Key Features
- 30% increase in horsepower and torque over the stock Evolution 80-inch engine
- Square bore-and-stroke configuration reduces piston speed for longer engine life and less vibration compared to longer-stroke designs
- Shorter than stock engine height for straightforward installation in stock and custom frames
- S&S performance 585 cam and valve springs
- S&S forged 3-piece flywheel assembly for strength and serviceability
- High-Volume High-Pressure (HVHP) oil pump for reliable lubrication under all conditions
- Large cooling fins for enhanced cooling efficiency
- Electronic compression releases for easier starting
- Lower 9.8:1 compression ratio makes fuel quality less critical than higher-compression alternatives
- Available in three finish options — Natural, Black (wrinkle black), and Black Edition (gloss black)
- Does not include carburetor or ignition — use your existing carb or aftermarket ignition system
- 2-year warranty; made in the USA
Technical Specifications
- Displacement: 111 cubic inches
- Bore: 4-1/8″
- Stroke: 4-1/8″
- Compression Ratio: 9.8:1
- Power Increase: Approximately 115-116 HP and 120-128 ft-lb of torque (configuration dependent)
- EFI Compatibility: Yes — crank and case machined for crank position sensor; aftermarket module or add-on tuner required
- Camshaft: S&S 585 gear-driven
- Flywheel Assembly: 3-piece S&S forged
- Oil Pump: High-Volume High-Pressure (HVHP)
- Cooling: Large cooling fins
- Natural Finish: Cast aluminum with chrome covers
- Black Finish: Wrinkle black with chrome rocker covers
- Black Edition Finish: Gloss black covers throughout
- Induction/Ignition: Not included
- Warranty: 2 years
- Country of Origin: USA
Fitment Notes
- Designed for 1984-1999 carbureted Harley-Davidson Evolution Big Twin chassis — Softail, FXR, Dyna, and Touring platforms
- Compatible with 1970-1999 custom chassis designed for alternator-style Evolution primary
- Carburetor and ignition are NOT included — existing carb can be reused; aftermarket performance ignition required
- EFI compatible — crank and case machined for crank position sensor; use with aftermarket module or add-on tuner for fuel injection applications
- A high-performance clutch is recommended due to the significant torque increase over stock
- Engines are shipped without oil — fill before first start
- Not legal for sale or use in California on any pollution-controlled motor vehicle
- Not legal for sale or use on any EPA pollution-controlled motor vehicle
- Review the Fitment tab for a complete year and model breakdown before purchasing
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