The Motorcycles and Choppers Channel explores how these machines are built and customized. Learn all about motorcycles and choppers at HowStuffWorks.
For speed, a balance of three key elements is essential. The Acabion GTBO blends aerodynamics, feather-like weight and a powerful engine to provide more speed than a driver could ever use -- great fuel economy, too.
Motorcycles have evolved in countless ways since their creating near the beginning of the 20th century. Check out our motorcycle image gallery to see how this trend exploded into the coutless motorcycle models, choppers and sport bikes you know today.
Curious about some of the most unique choppers ever built? Check out these pictures of powerful bikes and the modifications that make each of them one-of-a-kind.
The 2002 Harley-Davidson FXDL Dyna Lowrider offers one of the lowest seats of any Harley model. The standard Low Rider has accessory saddle bags and windshield and options for two-tone paint and spoke wheels. Check out the 2002 Dyna Lowrider.
Though the 2002 Harley-Davidson FXDWG3 is certainly not Harley-Davidson's first "factory custom" it just may be the most radical. From headlights to handlebars check out the radical custom features of the 2002 Harley-Davidson FXDWG3 motorcycle.
The 2002 Harley-Davidson FXSTB Night Train does not look much different from the model introduced in 1999. The original Night Train was a study in basic black. Learn how the 2002 FXSTB Night Train motorcycle remains true to its sinister origins.
Harley-Davidson has expanded the Sportster line to include models like the 2002 Harley-Davidson XL-883R Sportster inspired by looking back to the company's racing past. Read about the high-performing Harley-Davidson XL-883R Sportster motorcycle.
The 2002 Harley-Davidson XL-1200C Sportster has not changed much since its 1996 debut. Custom versions of the Sportster arrived as a way of adding big-Harley styling like two-tone paint to the middleweight line. Learn about the XL-1200c Sportster.
The 2002 Harley-Davidson VRSCA V-Rod is high-tech yet grounded in Harley tradition. Even those familiar with the rumors were stunned by the design sophistication of Harley's first "performance custom." Read about this exhilarating Harley motorcycle.
The 1999 Harley-Davidson Road King Classic is one of Harley-Davidson's most popular motorcycles. Introduced in 1994 the Road King adopted a Classic version for 1998 and the new Twin Cam 88 motor for 1999. Read about the 1999 Road King Classic.
From the day the 2000 Harley-Davidson FXSTD Deuce was introduced Harley-Davidson has had trouble keeping up with demand. The combination of custom appearance and contemporary features has made it a hot seller. Read about the popular FXSTD Deuce.
The 2001 Harley-Davidson FLTR Road Glide offers comfort convenience and sportier looks than most touring bikes. The bike is easily recognized by its frame-mounted fairing with cut-down windshield and dual headlights. Check out the FLTR Road Glide.
When Harley-Davidson made the 2002 FLSTF Fat Boy it knew enough not to mess with success. The motorcycle carried on much as before with only a few styling and design changes. Learn about the 2002 FLSTF Fat Boy one of Harley's most popular models.
The 1905 Harley-Davidson appeared two years after the first Harley-Davidson made its appearance. Only 16 of the 1905 model were ever built. To start the motor, riders would pedal the motorcycle up to speed like a bike. Read about this rare cycle.
The 1909 Harley-Davidson V-twin was Harley's first production V-twin. It was withdrawn from the market for a year and when it returned for 1911 it had mechanical intake valves and a belt-tensioning device. Learn about this classic Harley-Davidson.
The 1918 Harley-Davidson 18-J was Harley's most powerful motorcycle for the year. The matching sidecar gave its occupants far more luxury and weather protection than the motorcycle's rider enjoyed. Read about this 1918 Harley-Davidson motorcycle.
The 1920 Harley-Davidson 20-J sported the olive paint that first came in 1917. Styling changes were few during those years. The most notable came in 1920 when the headlight and horn switched places. V-twins still displaced the same 61 cubic inches.
The 1931 Harley-Davidson Model D switched from F-head to flathead (side valve) V-twins. First was a new 45ci model to compete with the Indian Scout. The next year the 61ci and 74ci Big Twins were changed to a flathead design. Read about the Model D.
The 1947 Harley-Davidson Servi-Car was made for auto repair shops making house calls. The mechanic could also hitch the rear bumper of the car with a tow bar and take it back to the garage. Learn about this versatile workaday Harley-Davidson model.
The 1951 Harley-Davidson Police Special motorcycle came with a variety of police equipment and was often available in colors not offered to civilians, but many eschewed chrome trim. Read about the 1951 Harley Police Special.
The 1952 Harley-Davidson FL Hydra-Glide replaced the old hand-shift/foot-clutch setup with a modern foot shift and hand clutch. The old setup was still an option and would remain so until the 1970s. Read about this major step for Harley's bikes.
The 1955 Harley-Davidson FL Hydra-Glide introduced new features like revised cast tank and fender badges. By this time chrome trim had become a popular way of dressing up and personalizing one's bike. Read about the 1955 Harley-Davidson Hydra-Glide.
The 1959 Harley-Davidson Police Special shows how the Big Twins have been popular with law enforcement agencies. Though a hand-clutch/foot-shift setup had been standard since 1952, many police chose the hand shifter. Learn about the Police Special.
The 1959 Harley-Davidson XLCH Sportster was a hotter version of the traditional Harley Sportster. See how it differs from its milder XLH sibling with magneto ignition, high-mounted exhaust peanut fuel tank, bobbed rear fender and semi-knobby tires.
Aside from a new tank badge and paint scheme the 1963 Harley-Davidson FL Duo-Glide didn't offer many changes. Most came with saddlebags and two-passenger Buddy Seat in addition to the windshield. Learn about this well-dressed touring motorcycle.
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