Chopper (motorcycle) - AbsoluteAstronomy.com

A chopper is a type of motorcycle

Motorcycle

A motorcycle is a single-track, two-wheeled motor vehicle. Motorcycles vary considerably depending on the task for which they are designed, such as long distance travel, navigating congested urban traffic, cruising, sport and racing, or off-road conditions.Motorcycles are one of the most...

that was either modified from an original motorcycle design ("chopped") or built from scratch to have a hand-crafted appearance. The main features of a chopper that make it stand out are its longer frame

Motorcycle frame

A motorcycle frame includes the head tube that holds the front fork and allows it to pivot. Some motorcycles include the engine as a load-bearing, stressed member. The rear suspension is an integral component in the design. Traditionally frames have been steel, but titanium, aluminium, magnesium,...

design accompanied by a stretch front end (or rake). To achieve a longer front end, while the frame is being designed, the fabricator

Fabrication (metal)

Fabrication as an industrial term refers to building metal structures by cutting, bending, and assembling. The cutting part of fabrication is via sawing, shearing, or chiseling ; torching with handheld torches ; and via CNC cutters...

will tilt the neck of the frame at less of an incline and install a longer fork

Motorcycle fork

A motorcycle fork connects a motorcycle's front wheel and axle to its frame, typically via a pair of triple clamps. It typically incorporates the front suspension and front brake, and allows the bike to be steered via handlebars attached to the top clamp....

. Another unique aspect of a chopper design is that there is usually no rear suspension meaning the frame of the motorcycle will extend from the neck (or front of the frame) all the way to the rear wheel. This can make handling the motorcycle more challenging and the ride a bit more "bumpy". These attributes may seem radical to some but is necessary for the look that is desired. One look that is becoming more popular with chopper designs is a low frame to ground clearance or a low-rider

Lowrider

]A lowrider is a style of car originated by Chicano communities that sits lower to the ground than most other cars. Many lowriders have their suspension systems modified so that their ride can change height at the flip of a switch...

look. Well known examples of chopper designs are the customized Harley-Davidson

Harley-Davidson

Harley-Davidson , often abbreviated H-D or Harley, is an American motorcycle manufacturer. Founded in Milwaukee, Wisconsin, during the first decade of the 20th century, it was one of two major American motorcycle manufacturers to survive the Great Depression...

s, the "Captain America" and "Billy Bike", seen in the 1969 film Easy Rider
Easy Rider
Easy Rider is a 1969 American road movie written by Peter Fonda, Dennis Hopper, and Terry Southern, produced by Fonda and directed by Hopper. It tells the story of two bikers who travel through the American Southwest and South with the aim of achieving freedom...

.

History

Before there were choppers, there was the bobber

Bobber (motorcycle)

A bobber is a custom motorcycle that usually has had the front fender removed, the rear fender "bobbed" or made smaller, and all superfluous parts removed to make it lighter.- History :...

, meaning a motorcycle that had been "bobbed," or relieved of excess weight by removing parts, particularly the fenders, with the intent of making it lighter and thus faster, or at least making it look better in the eyes of a rider seeking a more minimalist ride. An early example of a bobber is the 1940 Indian

Indian (motorcycle)

Indian is an American brand of motorcycles. Indian motorcycles were manufactured from 1901 to 1953 by a company in Springfield, Massachusetts, USA, initially known as the Hendee Manufacturing Company but which was renamed the Indian Manufacturing Company in 1928. The Indian factory team took the...

Sport Scout "Bob-Job" which toured in the 1998 The Art of the Motorcycle
The Art of the Motorcycle
The Art of the Motorcycle was an exhibition that presented 114 motorcycles chosen for their historic importance or design excellence in a display designed by Frank Gehry in the curved rotunda of the Frank Lloyd Wright-designed Solomon R. Guggenheim Museum in New York City, running for three months...

exhibition. Indian Scouts

Indian Scout (motorcycle)

The Indian Scout was a motorcycle built by the Indian Company from 1920 to 1949. It rivaled the Chief as Indian's most important model.-The first Scouts :The Scout was introduced in October 1919 as a 1920 model, with a engine...

and Chiefs of the time came with extravagantly large, heavily valenced fenders, nearly reaching the center of the wheel on the luxurious 1941 Indian Series 441 while racing bikes had tiny fenders or none at all. The large and well-appointed bikes exemplified the "dresser" motorcycle aesthetic and providing a counterpoint to the minimalist bobber, and cafe racers. Choppers would grow into and explore the dimensions of the space between the stripped-down bobbers and weighed-down dressers.

In the post-World War II United States, servicemen returning home from the war started removing all parts deemed too big, heavy, ugly, or not essential to the basic function of the motorcycle, such as fenders, turn indicators, and even front brakes. The large, spring-suspended saddle

Saddle

A saddle is a supportive structure for a rider or other load, fastened to an animal's back by a girth. The most common type is the equestrian saddle designed for a horse, but specialized saddles have been created for camels and other creatures...

s were also removed in order to sit as low as possible on the motorcycle's frame. These machines were lightened to improve performance for dirt-track racing and mud racing.

Forward-mounted foot pegs replaced the standard large 'floorboard' foot rests. Also, the standard larger front tire

Tire

A tire or tyre is a ring-shaped covering that fits around a wheel rim to protect it and enable better vehicle performance by providing a flexible cushion that absorbs shock while keeping the wheel in close contact with the ground...

, headlight and fuel tank

Fuel tank

A fuel tank is safe container for flammable fluids. Though any storage tank for fuel may be so called, the term is typically applied to part of an engine system in which the fuel is stored and propelled or released into an engine...

were replaced with much smaller ones. Many choppers were painted preferably all in either flat black or in shiny metallic “metal flake” colors. Also common were many chromed parts (either one-off fabricated replacements or manually chromed stock parts). According to the taste and purse of the owner, chop shops would build high handle bars, or later Ed Roth

Ed Roth

"Big Daddy" Ed Roth was an artist, cartoonist, custom car painter, and pinstriper who created the hot-rod icon Rat Fink and other extreme characters. As a custom car builder, Roth was a key figure in Southern California's Kustom Kulture and hot-rod movement of the late 50's and 1960's...

's Wild Child designed stretched, narrowed, and raked front forks. Shops also custom built exhaust pipes and many of the “after market kits“ followed in the late 1960s into the 1970s. Laws required (and in many locales still do) a retention fixture for the passenger, so vertical backrests called sissy bar

Sissy bar

A sissy bar, also called a "sister bar" or "passenger backrest" is an addition to the rear of a motorcycle that allows the rider or passenger to recline against it while riding...

s were a popular installation, often sticking up higher than the rider's head.

While the decreased weight and lower seat position improved handling and performance, the main reason to build such a chopper was to show off and provoke others by riding a machine that was stripped and almost nude compared to the softer-styled stock Harley-Davidson

Harley-Davidson

s, let alone the oversized automobiles of that time.

Traditional choppers

In the United States servicemen returning from World War II were looking for a thrill. Many veterans had been trained to work on automobiles and motorcycles and were looking to add a little excitement to their post-war lives with their newly acquired mechanical skills. Motorcycles and Hot Rod

Hot rod

Hot rods are typically American cars with large engines modified for linear speed. The origin of the term "hot rod" is unclear. One explanation is that the term is a contraction of "hot roadster," meaning a roadster that was modified for speed. Another possible origin includes modifications to or...

s were the perfect hobby for them. Motorcyclists bought up surplus military bikes and removed all the unnecessary parts such as windshields and saddlebags to minimise weight. Rear fenders were "bobbed" or shortened just enough to handle a passenger and keep the rain and mud coming off the rear, and sometimes removed the mirrors, or replaced them with tiny ones, such as the type used by dentists in their work.

This type of home customization led to the rise of the bobber. Then in the 60s, motorcyclists found that a longer front end allowed the bike to run smoother at faster speeds. The degree of neck rake and length of front end was modified on these bikes with this in mind. The Girder and Springer front ends were the most popular forks for extending in this fashion, although this does make the bike harder to handle at slower speeds. Nevertheless, some choppers have extremely long forks; as one biker said, "You couldn't turn very good but you sure looked good doing it."

To build or chop a traditional chopper an unmodified factory bike is used (usually a rigid Harley Davidson) and everything unnecessary to either move or stop is stripped or chopped off. Then the engine and transmission are removed and the frame is cut up and welded back together to make it lower and lighter. Performance parts are added or modified to increase speed.

Today's chopper era

Choppers have enjoyed a large following. Companies like Jesse G. James

Jesse G. James

Jesse Gregory James is an American television personality and CEO of West Coast Choppers, a manufacturer of custom-made motorcycles. James was the host of the reality TV shows Jesse James is a Dead Man on Spike TV and Monster Garage, on the Discovery Channel, and the focus of the documentary...

' West Coast Choppers

West Coast Choppers

West Coast Choppers is a lifestyle brand that began selling screen-printed t-shirts and stickers with the company's Iron cross/Maltese cross logo while founder and "master marketer" Jesse G. James was finishing high school, packaging the accoutrements of the chopper lifestyle long before any...

have been successful in producing expensive traditional chopper-style bikes and a wide range of chopper-themed brands of merchandise such as clothing, automobile accessories and stickers.

A distinction should be noted between true chopper (or chopper-style) motorcycles, and custom motorcycles, or 'custom cruisers'. Despite the name, a large percentage of the motorcycles produced by popular companies such as Orange County Choppers

Orange County Choppers

Orange County Choppers is a custom and production motorcycle manufacturer based in Orange County, New York, that was founded by Paul Teutul, Sr., and Paul Teutul, Jr., in 1999. The company was featured on American Chopper, a reality TV show that debuted in September 2002 on the Discovery Channel,...

, Indian Larry, Falcon Motorcycles

Falcon Motorcycles

Falcon Motorcycles makes custom motorcycles in Los Angeles, California. It was founded in 2008 by industrial designer Ian Barry and his partner Amaryllis Knight, and specializes in the design, engineering and fabrication of one of a kind machines, built around the derelict engines of pre- and...

, and Von Dutch Kustom Cycles

Kenny Howard

Kenneth Robert Howard , also known as Dutch, Von Dutch, or J. L. Bachs , was a motorcycle mechanic, artist, pinstriper, metal fabricator, knifemaker and gunsmith...

are better described as custom bikes rather than choppers.

A distinction should also be made between choppers and bobbers. While both tried to improve performance by removing any part that did not make the motorcycle perform better, they differed in an important way: bobbers kept the original factory frame, while choppers have a modified form of the factory frame.

When individuals were stripping their stock motorcycles and bobbing their fenders, the term bobber was born. When individuals started cutting (or chopping) and welding their frames thereby repositioning/restyling them, the term "chopper" was born. Chopping was the next phase in the evolution that followed dirt track bobbing.

While people assume that the chopper style motorcycles were built purely for aesthetics, there is a real performance advantage to the raked front end on these choppers. These motorcycles have a much more stable feel at high speeds and in a straight line than motorcycles with original factory front suspensions. However, like any other modification, there is a downside: the raked front end feels heavier and less responsive at slow speeds or in curves and turns. This is due to the longer trail measurement associated with increased rake.

Changing the rake and trail of a motorcycle design requires modification of the design itself. This is a job that requires in-depth input from a motorcycle designer who is experienced with such design changes. A triple tree can be raked, or designed so the lower tree sticks out further than the upper tree, thus increasing the rake of the forks in relation to the steering head rake. What this does, is position the axle closer to the frame rake measurement line, or shortening the trail. Thus, when adding raked trees to a raked frame (which sports a longer trail), the trail is shortened to a more manageable level. Adding raked trees to a frame with short rake and trail can be hazardous, as shortening an already short trail measurement can lead to an unstable situation as speed increases.

Despite the personalized nature of choppers, and the wide availability of alternative designs, chopper builders have overwhelmingly chosen fat rear tires, a rigid-looking frame (even for a softail

Softail

The term softail refers to motorcycles and bicycles that feature a rear suspension system with springs or shock absorbers to absorb bumps. On Softail motorcycles, the shock absorbers or springs are often hidden underneath out of view to give the appearance of a hard-tail or rigid frame, however...

), and an original or replica air-cooled, pushrod v-twin

V-twin

A V-twin engine is a two-cylinder internal combustion engine where the cylinders are arranged in a V configuration.- Crankshaft configuration :Most V-twin engines have a single crankpin, which is shared by both connecting rods...

engine. In the UK, due to the cost and lack of availability of the v-twin

V-twin

engine, many chose to use British engines from bikes such as Triumph or BSA; lately as availability has increased, Japanese engines have seen more use. Some people feel that the variety of engines and other components used more recently (especially on bikes built outside of the US) is diluting the signature appearance of the chopper style. Modern bobber builders tend to distinguish themselves from chopper builders with bikes styled before the chopper era. Modern bobber builder Jan Bachleda in Colorado builds custom choppers and bobbers using Triumph engines and frames from the 1970s and earlier. The look, though chopped, is distinctly modern and low. Today's custom choppers are usually seen as center pieces at bike night events around the United States.

The United States of America, where most custom choppers reside, is one of the few countries in the world that allow custom-built choppers to be licensed for highway use. Many of these types of choppers are regarded as dangerous to operate and don't follow basic design geometry and lack many safety features in their construction.

Choppers in Australia

Australian Design Rules (ADRs) limit frame modifications and fork extensions to 6 inches (152.4 mm). The most restrictive rule allows a maximum distance of 550 mm from the front axle horizontally back to the steering head. Noise restrictions and handlebar dimensions are also regulated. However, in some states ADRs do not apply to pre-1977 motorcycles, so some older, more radical choppers are still seen on Australian roads.

History

Traditional choppers

Today's chopper era

Choppers in Australia

See also