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Harley-Davidson 131ci Milwaukee-Eight V-Twin Crate Engine

Harley-Davidson offers its largest-displacement V-twin engine as an Screamin’ Eagle accessory.

September 2, 2020

Harley-Davidson shows off a new 131ci V-twin engine that is a direct replacement for 2017 and newer touring bikes and 2018 and later Softails.Harley-Davidson Motor Company

Harley-Davidson announced that it is offering a high-capacity 131ci (2,151cc) Milwaukee-Eight V-twin engine for purchase. The street-legal 49-state engine is a direct replacement for 2017 and newer touring motorcycles originally equipped with either a Milwaukee-Eight oil-cooled or twin-cooled engine. It is also compatible with 2018-later Softails. The Screamin’ Eagle 131 engine is incompatible with trike three-wheelers, and does not meet California noise and emissions standards.

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The engine benefits from an undersquare design with 4.31-inch cylinder bore and 4.5-inch piston stroke. Fuel is squeezed to 10.7:1 compression ratio via forged alloy pistons. CNC-machined cylinder heads with a high-lift camshaft and 1mm larger valves help flow more fuel and spent exhaust gases. A larger throttle body and high-flow fuel injectors complement the intake modifications.

The Motor Company claims 135 pound-feet of torque and 124 hp at the back tire when paired with its Screamin' Eagle Street Cannon exhaust.

Manufactured in Menomonee Falls, Wisconsin, the engine retails for $6,195 for the oil-cooled edition, and $200 more for the twin-cooled version. When installed by a Harley-Davidson dealer, the power unit includes a 12-month factory limited warranty.