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NEW HARLEY-DAVIDSON SCREAMIN’ EAGLE 135 STAGE IV CRATE ENGINE SETS NEW PERFORMANCE BENCHMARK
New Wireless Screamin’ Eagle Pro Street Performance Tuner Simplifies Engine Set-Up
MILWAUKEE (March 1, 2023) – Harley-Davidson® riders craving no-compromise efficiency have an exhilarating new choice with the introduction of the Screamin’ Eagle® 135ci Stage IV Performance Crate Engine. This full Milwaukee-Eight® engine for 2021-later Touring fashions is the brand new benchmark for factory-engineered American V-Twin efficiency, providing essentially the most displacement, and essentially the most energy, ever created by Harley-Davidson for a street-compliant crate engine. Its growth was fueled partly by the efforts of the Harley-Davidson® Screamin’ Eagle® manufacturing facility racing crew competing within the MotoAmerica Mission King of the Baggers roadracing collection. To simplify arrange of high-performance engines Harley-Davidson provides the brand new wi-fi Screamin’ Eagle® Pro Street Performance Tuner, the one tuner accessible to maximise efficiency whereas being emissions and guarantee compliant.
![](https://i0.wp.com/blog.motorcycle.com/wp-content/uploads/2023/03/Hp-v-Torque-490x633.jpg?resize=490%2C633&ssl=1)
Graph offered by Harley-Davidson.
Engineered and examined as a whole assortment of high-performance parts and assembled from the underside up at Harley-Davidson Powertrain Operations in Menomonee Falls, Wisconsin, this street-tuned 135-cubic-inch (2212cc) Screamin’ Eagle Crate Engine is designed to run with a wide-open throttle at excessive engine speeds and supply on the spot passing energy from cruising pace. The engine delivers 143 lb.-ft. of rear-wheel torque at 3500 RPM and 130 rear-wheel horsepower at 5500 RPM – roughly 28 p.c extra torque and 41 p.c extra horsepower on the rear wheel than a manufacturing Milwaukee-Eight® 117 engine.
![](https://i0.wp.com/blog.motorcycle.com/wp-content/uploads/2023/03/135-cam-chest--422x633.jpg?resize=422%2C633&ssl=1)
Photo courtesy of Harley-Davidson.
This street-ready efficiency engine options premium Screamin’ Eagle parts:
- New 68mm throttle physique and matching CNC-machined consumption manifold, initially developed for Harley-Davidson Screamin’ Eagle manufacturing facility racing crew engines, to maximise airflow to the engine.
- Screamin’ Eagle Extreme CNC-ported cylinder heads present considerably improved effectivity of cylinder filling, resulting in extra explosive energy and elevated rear-wheel torque when in comparison with inventory. High-performance valve springs stay steady with the high-lift cam and in high-RPM operation.
- Screamin’ Eagle Pro Billet Cam Plate and Oil Pump supplies increased strain when the oil is sizzling to maintain strain drops to a minimal.
- New 10.7:1 high-compression cast pistons.
- SE8-517 high-lift camshaft, high-performance cam bearing and high-performance tappets.
- Patent-protected 4.31-inch metal sleeve cylinders and new 4 5/8-inch flywheel (bore x stroke is 4.31 x 4.625).
- New high-capacity 6.8 gram/second gasoline injectors.
- Screamin’ Eagle Ventilator Extreme Air Cleaner and Screamin’ Eagle Street Cannon mufflers (every offered individually) should not required however are extremely really helpful for peak efficiency.
The Screamin’ Eagle 135ci Stage IV Performance Crate Engine is meant for bolt-in set up in an authentic equipment-style 2021-later Harley-Davidson® Touring chassis. No particular fabrication or engine-mount relocation is required. The engine is backed by as much as two-year producer’s guarantee for unmatched confidence when dealer-installed by the Custom Coverage® program.
With an MSRP of $7,999.95 the Screamin’ Eagle 135ci Stage IV Performance Crate Engine is obtainable in Black or Chrome end with 135 Stage IV badging on the cylinder heads and timer cowl.
![](https://i0.wp.com/blog.motorcycle.com/wp-content/uploads/2023/03/135-on-bike-422x633.jpg?resize=422%2C633&ssl=1)
Photo courtesy of Harley-Davidson.
Two variations of the engine might be provided: For 2021-later Touring fashions outfitted with Air/Oil-Cooled Milwaukee-Eight® engine, and for 2021-later Touring fashions outfitted with a Twin-Cooled™ Milwaukee-Eight engine. The engine doesn’t match Trike fashions. Installation requires the separate buy of Head Pipe P/N 65600177. Air-Cooled fashions require Oil Cooler Fan Assist P/N 62700204 or Fan for Factory Oil Cooler P/N 26800195. All fashions require ECM recalibration with Screamin’ Eagle Pro Street Tuner for correct set up. Does not match California fashions.
Harley-Davidson stands for the timeless pursuit of journey and freedom for the soul. Go to H-D.com to be taught extra in regards to the full line of 2023 Harley-Davidson Grand® American Touring, Sport, Adventure Touring, Cruiser and Trike bikes, Harley-Davidson Certified™ pre-owned bikes, Harley-Davidson® Genuine Motor Parts & Accessories, Harley-Davidson® MotorGarments® attire and kit, and Harley-Davidson Financial Services.
Source: weblog.bike.com