Tens of thousands and thousands of {dollars} and numerous man-hours go into Harley-Davidson’s King of the Baggers operation. None of these sources go to waste, both, with the Motor Company snatching the KotB crown in 2021 and almost repeating in 2022. The fruits of the race group’s labor transcend the circuit as effectively, with H-D engineers and designers fashioning race-developed elements for model trustworthy.
Now, Harley brings much more KotB-proven efficiency to the market with its Screamin’ Eagle 135ci Stage IV crate engine. The new top-dog Milwaukee-Eight V-twin options the identical 68mm throttle physique and CNC-machined consumption manifold initially designed for Kyle and Travis Wyman’s championship-contending Road Glide Special. Screamin’ Eagle Extreme CNC-ported cylinder heads, high-performance valve spring, and an SE8-517 high-lift camshaft take full benefit of the V-twin’s bigger 2,212cc quantity.
Forged pistons shoot via 4.31-inch steel-sleeve cylinders with 4.625 inches of stroke. The 4 5/8-inch flywheel steadies the big-bore M8, whereas the Screamin’ Eagle Pro Billet Cam Plate and Oil Pump preserve optimum oil strain. With a ten.7:1 compression ratio and high-flow gas injectors (6.8 grams/second), the 135 crate engine lays down 143 lb-ft of torque (at 3,500 rpm) and 130 horsepower (at 5500 rpm)—all on the rear wheel.
That output eclipses the Bar and Shield’s largest manufacturing engine, the Milwaukee-Eight 117, by 28 p.c within the torque division and 41 p.c in pony energy. Harley-Davidson recommends pairing the Stage IV Milwaukee-Eight with Screamin’ Eagle Ventilator Extreme Air Cleaner and Screamin’ Eagle Street Cannon mufflers to attain these reported energy figures.
Retailing for $7,999.95, the Screamin’ Eagle 135ci Stage IV Performance Crate Engine is available in a Black or Chrome end and is suitable with 2021 and later Touring fashions (sans Trikes). The model additionally gives the crate engine in Air/Oil-Cooled and Twin-Cooled configurations.
To retain emissions and guarantee compliance, the set up additionally requires ECM recalibration with the Screamin’ Eagle Pro Street Tuner. Of course, 135 Stage IV badging on the cylinder heads and timer cowl lets everybody know that your Hog advantages from KotB-derived efficiency.
Source: www.rideapart.com