Harley-Davidson Releases Screamin’ Eagle 120ST Crate Engine

Harley-Davidson->ke300 and crate engines are like BFFs. One can’t live without the other and you can be sure that if given an opportunity, Harley will build as many as crate engines as it can possibly build. The latest of this sort to come out of the company is the Screamin’ Eagle 120ST crate engine, a 1,966 cc air-cooled power plant that’s capable of producing 106 horsepower and 117 pound-feet of torque.

But beyond the numbers, there’s a lot that goes on in the Screamin’ Eagle that could make it an appealing choice for Harley-powered custom projects. Its physical make up allows it to become a bolt-in installation in any Harley Touring->ke1820 chassis. That’s the easy part. It does become a little bit more complicated when said project needs to find the chassis to make it work. That or they can just design one to accommodate the unit into the chassis. It’s not exactly a simple science, but it can be done with the proper tools and know-how.

The motor itself also comes with a Screamin’ Eagle 58 throttle body that’s 18 percent larger than stock, making it easier for the engine to reach the kind of performance level it’s touting to everyone.

Aesthetically speaking, Harley decided to eschew the standard all-chrome look in favor of something a little splashier to the custom tuner’s eye. It’s predominantly finished in wrinkle black with matching chrome details and splashes of machined aluminum. Not that the color really matters in the grand scheme of things, but as far as mixing and matching are concerned, the color finish creates enough flexibility for the engine to be fitted in any custom project. That’s a pretty smart move by Harley, especially with the simplicity by which it did it.

Click "continue reading" to read more about Harley-Davidson's new Screamin' Eagle 120 engine.

Why it matters

Harley itself is recommending a few more details to make the most of the new performance crate engine. For one, the engine isn’t compatible with twin-cooled models, but is street legal when the project makes use of OEM mufflers or in Harley’s case, a Screamin’ Eagle Street Performance Exhaust System. The company’s also saying that any project that uses this engine also gets the a Screamin’ Eagle 58mm High-Flow Air and a Screamin’ Eagle High Flow Exhaust System. These components are also available, albeit as separate purchases.

So, are you interested in the new Screamin’ Eagle SE120ST Crate Motor? If you are, you need to have $5,695 at your disposal. That’s not even counting the $159.95 you need to pay for the high-flow air cleaner and the $1,299.95 for the exhaust system.

That adds up to $7,154.90 for the entire set-up. That's admittedly a little steep for my standards, but I do know that there are aftermarket tuners out there that won't mind shelling that much money to get a hold of this new crate engine.

Screamin’ Eagle 120 Specifications

-4.060 big-bore cylinders

-4 5/8-inch (117 mm) stroke SE Pro stroker flywheel and rod assembly

-10.5:1 high-compression nickel-plated forged pistons with Teflon coated skirt

-Titanium SST piston rings

-SE-259E high-lift cams

-Perfect Fit push rods

-SE high-performance lifters

-CNC-ported MVA heads with automatic compression release

-SE Pro High-Flow 58mm EFI Throttle Body, high flow injectors and manifold clamps

-Machined lower rocker boxes for valve spring collar clearance

-Factory-machined engine cases