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Indian Motorcycle Unveils New PowerPlus Engine

Oct 22 2019

Exactly one week prior to the anticipated launch of the new fixed-fairing bagger, the Challenger, Indian Motorcycle has pulled the cover off its all-new liquid-cooled 108 c.i PowerPlus engine. And the company's claimed performance numbers are certainly impressive.

Named after the original PowerPlus motorcycle built from 1916 to 1924, according to Indian, this is their "most powerful engine to-date" with a "class-leading 122 horsepower and 128 ft-lbs of torque." Additional features include an all-new powertrain with Rain, Standard and Sport ride modes, allowing riders to dial in their preferred throttle mapping and traction control preferences, similar to the FTR 1200.

The PowerPlus engine will be the focal point as the powerplant behind Indian's new fixed-fairing bagger, the Challenger. Although rumors of the Challenger have been swirling since Spring, along with a few leaked photos and videos, the official Indian Challenger release date is scheduled for October 29, 2019.

•Engine Displacement: 108 cu in (1769 cc)
•Power: 122 hp at 5,500 RPM
•Torque: 128 ft-lbs at 3,800 RPM
•Maximum Engine Speed: 6,500 RPM
•Architecture: 60-degree V-twin, liquid-cooled
•Timing: Overhead camshafts and four valves per cylinder
•Transmission: Six-speed with true overdrive, constant mesh
•Clutch: Assist clutch

The following was issued as part of an official Indian Motorcycle press release:

“We challenge our engineers with the notion that anything less than best-in-class design and performance will simply not get it done, and it’s clear with this new engine that they have delivered on that high standard,” said Steve Menneto, Indian Motorcycle President. “Countless hours were spent in design, development and testing to ensure this is the best liquid-cooled V-twin ever developed, and I could not be prouder of our team and this incredible motor.”

The PowerPlus adopts several design and performance features from the liquid-cooled 1,133 cc Indian Scout engine, including an overhead camshaft design utilizing four valves per cylinder. But comparisons end there. The PowerPlus was developed with a big-piston, big-torque mindset with an end game of maximum power delivery across the entire curve.

The all-new powertrain features a six-speed transmission with true overdrive, assist clutch to reduce clutch effort, and three ride modes that allow riders to tailor throttle mapping to their riding preferences. Advanced technology also includes hydraulic valve lash adjusters and hydraulic camshaft chain tensioners for ease of maintenance and reliability.

“You simply cannot deliver the ultimate bagger without an engine that stands head and shoulders above anything else in its class, and that was the motivation behind the PowerPlus,” said John Callahan, Indian Motorcycle Vice President, Engineering. “We developed the most sophisticated V-twin powerplant in the industry, and then we spent month after month, hour upon hour, putting it through the most intense paces to ensure it could take whatever we threw at it. The end result is something truly special.”

The PowerPlus will be built in Osceola, Wisconsin with final motorcycle assembly taking place in Indian Motorcycle’s production facility in Spirit Lake, Iowa.

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