S&S Cycle V111 Evolution Long Block Engine for 1984-1999 Harley-Davidson Evo Big Twin

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