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Is there any way I can impose a travel ban on Harley-Davidson? (Illustration by Dana Summers of the Tribune Media Services)

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FILE - In this April 27, 2017, file photo, the Harley-Davidson name is seen on the gas tank of a motorcycle in Northbrook, Ill. The Justice Department is seeking to waive part of the penalty Harley Davidson Inc. agreed to pay in 2016 to settle a case over air pollution involving racing tuners that caused its motorcycles to emit higher-than-allowed pollution levels.The Justice Department on July 20, 2017, filed a new consent decree with the U.S. District Court for the District of Columbia. It eliminates a requirement that the Milwaukee-based company spend $3 million to curb air pollution in local communities by paying to replace conventional woodstoves with cleaner-burning versions. (AP Photo/Nam Y. Huh, File)

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In this 2010 photo provided by the family of Arthur Werner Sr., Werner poses for a photo on his 1990 Harley-Davidson Heritage Softail motorcycle in Bethlehem, Pa. Werner, of Steel City, Pa., died of cancer Sunday, June 25, 2017, but made plans to be buried in his motorcycle's sidecar after his funeral scheduled Friday, June 30, 2017. (Brittany Werner via AP)

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In this Feb. 22, 2017 photo, Jeremy Taylor, left and Chase Wainwright were among the technicians who helped build the World War II-themed motorcycle at the Harley-Davidson dealership in Tallahassee, Fla. The motorcycle looks reminiscent of vehicles on the set of the 1998 World War II classic movie like "Saving Private Ryan," with that distinct shade of green and black accents.(Nada Hassanein/Tallahassee Democrat via AP)

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Captain America Harley Davidson.jpg

Marvel and Harley-Davidson teamed up to build custom motorcycles inspired by iconic superheroes. (Harley-Davidson)

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This Monday, July 16, 2012, photo, shows a sign for Harley-Davidson Motorcycles at the Harley-Davidson store in Glendale, Calif. On Feb. 1, 2017, CNN reported that a planned visit by President Trump to a Harley plant in Milwaukee was canceled by the company due to concern over attracting protesters outside the facility. (AP Photo/Grant Hindsley, File)

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Hundreds of bikes line Route 50 outside of the Patriot Harley-Davidson in Fairfax as volunteers and riders prepare for the annual Ride of the Patriots in support of Rolling Thunder.

XR750

XR750

The Harley-Davidson XR-750 is a racing motorcycle made by Harley-Davidson since 1970, primarily for dirt track racing, but also for road racing in the XRTT variant. The XR-750 was designed in response to a 1969 change in AMA Grand National Championship rules that leveled the playing field for makes other than Harley-Davidson, allowing Japanese and British motorcycles to outperform the previously dominant Harley-Davidson KR race bike. The XR-750 went on to become the winningest race bike in the history of American Motorcyclist Association (AMA) racing. The XR-750 is associated with the careers of racers Mark Brelsford, Cal Rayborn, and Jay Springsteen, and was the favorite motorcycle of stunt performer Evel Knievel. Knievel used the bike from December 1970 until his final jump in January 1977. An XR-750 was included in the 1998 The Art of the Motorcycle exhibition, and one of Knievel's bikes is in the Smithsonian'sNational Museum of American History America on the Move exhibit. Riders on XR-750s have won 29 of the 37 AMA Grand National Championships from 1972 to 2008 inclusive. Besides having more wins than any other bike in AMA racing, it has been called the "most successful race bike of all time", and has a claim to have more wins than any other racing motorcycle in history.

Panhead

Panhead

The panhead was a Harley-Davidson motorcycle engine, so nicknamed because of the distinct shape of the rocker covers. The engine is a two-cylinder, two-valve-per-cylinder, pushrod V-twin. The engine replaced the Knucklehead engine in 1948 and was manufactured until 1965 when it was replaced by the Shovelhead. As the design of Harley-Davidson engines evolved through the years, the distinctive shape of the valve covers has allowed Harley enthusiasts to classify an engine simply by looking at the shape of the covers, and the panhead has covers resembling an upside-down pan. The "Captain America" chopper used by Peter Fonda in the movie Easy Rider (1969) had a panhead engine, as did the "Billy Bike" ridden by Dennis Hopper's character.

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Harley_Davidson_11F

1915 Model 11-F -Like the Model 11-J, the Model 11-F used the upgraded 11-horsepower V-twin engine that Harley-Davidson improved for 1915. The engine had a mechanically driven oil pump for more positive lubrication, a major improvement because it eliminated the need for the rider to work the hand pump that had been required to maintain pressure in the oil tank while riding. The mechanically driven pump did all the work, and did it in a more reliable way. Even though the 11-Fs engine had this new feature, the bike qualified as the poor mans Harley of the time because it lacked the new electrical system found on the 11-J. Using the old acetylene-burning lights saved 11-F owners $35 compared to the 11-Js MSRP, a hefty sum in 1915. Obviously the savings was worth it to customers, because the 11-F topped all other Harley models for the year, making it the best-selling Harley up to that time. The new engine also proved popular for racing, and Harley-Davidson offered a race model with the new engine for customers wanting to compete on dirt ovals and board tracks that were popular at the time.

FL

FL

FL is a model designation used on motorcycles manufactured by Harley-Davidson from 1941 to present. Mostly applied to Harley's large-framed bikes, including the current Touring series, the FL designation is also used with their Softail series, especially on Softails with traditional styling, 16-inch front wheels, and either Springer forks or large-diameter telescopic front forks. The FL was introduced to the Harley-Davidson model line in 1941. It used a 74 cu in (1,210 cc) version of the "Knucklehead" OHV engine that powered the EL in 61 cu in (1,000 cc) form. The FL shared its frame with the EL and with the U and UL, which used a 74 cubic inch flathead engine. The FL replaced the UH and ULH, which used the same frame with 80 cu in (1,300 cc) flathead engines. The FL continued relatively unchanged until 1948, when it and the EL were given redesigned "Panhead" engines of the same capacities as before. These engines had several improvements over the earlier "Knuckleheads", including self-adjusting hydraulic lifters and aluminum cylinder heads to reduce weight and improve cooling. The U and UL flathead twins were discontinued in 1948, leaving the OHV EL and FL models as Harley-Davidson's large-frame motorcycles.

EL

EL

In 1936 Harley-Davidson introduced the EL, an overhead valve, 61 cubic inch powered bike. With increased horsepower and bold styling changes, the motorcycle quickly earns the nickname of "Knucklehead," due to the shape of its rocker boxes.

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FILE - In this July 14, 2015, file photo, Republican presidential candidate Wisconsin Gov. Scott Walker speaks during a campaign event at a Harley-Davidson dealership in Las Vegas. Walker is scheduled to address an annual showcase of conservative activists, Thursday, July 23, in San Diego. (AP Photo/John Locher, File)

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Republican presidential candidate, Wisconsin Gov. Scott Walker, shakes hands during a campaign event at a Harley-Davidson dealership Tuesday, July 14, 2015, in Las Vegas. (AP Photo/John Locher)

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Republican presidential candidate Wisconsin Gov. Scott Walker, speaks during a campaign event at a Harley-Davidson dealership Tuesday, July 14, 2015, in Las Vegas. (AP Photo/John Locher) ** FILE **

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Republican presidential candidate Wisconsin Gov. Scott Walker speaks during a campaign event at a Harley-Davidson dealership Tuesday, July 14, 2015, in Las Vegas. (AP Photo/John Locher)

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Harley-Davidson's new electric motorcycle, the LiveWire model one, will be unveiled Monday at an event in New York.

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Peter Fonda, who played Captain America in "Easy Rider," poses atop a Harley-Davidson based on the motorcycle he rode in the counterculture film released in 1969. The young Mr. Fonda and his sister, Jane (below), who also joined the family business, board a flight to Europe with their father in summer 1957. (associated press)