Dual-sport

A dual-sport, colloquially known as "dualie" or an "on-off road bike" is a type of street-legal motorcycle that is designed for both on and off-road use. The terms dual-sport and DualSport are also used. Dual sports are equipped with street-legal equipment such as lights, speedometer, mirrors, and horn, and can, therefore, be registered and licensed. Examples of dual-sport models include the BMW GS series, KTM Adventure series, Kawasaki KLR, Suzuki DRZ and V-Strom, Honda XL, Yamaha XT and many more.

Evolution of Dual Sports

“The concept of a versatile motorcycle equally at home on dirt and pavement is as old as motorcycling itself. Most roads were still unpaved when motorized bicycles first appeared around 1900. In a sense, all motorcycles at that time were dual sports, intended to be used on dirt as well as pavement. Advertisements well into the 1920’s depict motorcycles on dirt roads, raising clouds of dust. By 1940, most roads were paved and motorcycles had become heavier and more oriented to the street. In the 1950’s and 60’s British manufacturers such as Triumph and BSA offered versions of their, relatively light, street motorcycles with high exhaust pipes, and called them scramblers.” [ Adams, Carl: (2008) The Essential Guide to Dual Sport Motorcycles", pp. 18; Whitehorse Press, New Hampshire. ISBN - 13: 978-1-884313-71-4] Yamaha is credited with rekindling popular interest in dirt worthy motorcycles that could also be ridden on the street. In 1968 they introduced the hugely successful DT-1 based on a 250cc two-stroke engine. Other manufacturers soon followed with similar models called enduros. These light weight machines were good on trails, and adequate on pavement.

“Over the next 20 years manufacturers began producing heavier and less dirt worthy enduros based on four-stroke engines, as they searched for better combinations of weight, power, durability, performance and comfort. The heavier machines were less popular with “real” dirt riders and who began modifying them to create lighter, more competent, trail machines.

Suzuki introduced the DR350 in 1990 and promoted it as a DualSport (one word) or “dirt bike with a license plate”. DualSport is a registered trademark of Suzuki Motor Corporation. The terms dual sport or “dualie” were quickly adopted by riders and the motorcycle press.

Manufacturers use several different names for their dual sport models. Suzuki uses DualSport to describe its products. Kawasaki describes its offerings as dual purpose, Honda lists its entry under off-road, and other manufacturers describe machines as enduros, or simply list them as model numbers. A few models are described as adventure bikes. Despite these differences in terminology most enthusiasts understand that dual sports are licensed motorcycles that can be operated on highways, dirt roads and trails.

Types of Dual Sports

Terms such as dual sport, enduro and adventure bike are marketing descriptions, not strict definitions of weight and power. For example, the lightest DualSport offered by Suzuki Motor Corporation in 2008 weighs about 250 pounds and has a small single-cylinder engine with barely enough power for highway use. The heaviest DualSport offered by Suzuki Motor Corporation in 2008 weighs about 460 pounds and has a large two-cylinder engine with plenty of power for long freeway trips. Accordingly, it is necessary to refer to the manufacturers specifications for a particular model to learn more about its intended use.

There are four ways of creating dual sports. Some manufacturers add street-legal equipment to existing off-road motorcycles. These bikes are usually light and powerful, at the expense of shorter service life and higher maintenance. This approach is currently taken by European manufacturers such as KTM and Husqvarna. Other manufacturers start with a clean sheet of paper and design a new model designed for a specific combination of dirt and street use. These motorcycles are usually heavier and more durable than the models derived from off-road motorcycles. This approach is currently taken by BMW, Honda, Suzuki, Yamaha and Kawasaki. Several manufacturers modify street motorcycles to make them more dirt worthy. These bikes are usually more at home on pavement. Finally, owners add street-legal equipment to off-road bikes. However, some states only license motorcycles that meet emissions requirements.

Dual sports may be grouped by weight and intended purpose. Lightweight dual sports weigh about 250 to three hundred pounds. They have high fenders and ground clearance plus long travel suspension and are usually shod with aggressive dirt oriented tires known as “knobbies”. Lightweights are closest to pure dirt bikes and are most at home on rough trails and two-track roads with occasional forays onto pavement.

Middleweight dual sports weigh more than 300 pounds up to about 350 pounds. They usually have less suspension travel and ground clearance than lightweights and are often shod with tires that offer a compromise between dirt and pavement performance. Middleweights are most at home on smooth trails, graded dirt roads and pavement.

Heavyweight dual sports weigh over 350 pounds. They are designed primarily for riders who want to travel long distances on pavement with occasional forays onto dirt roads. They are usually shod with smoother tires that perform better on pavement. These motorcycles are also called adventure bikes by some manufacturers.

It should be noted that these types are only approximate and new models that split the boundaries and offer different combinations of features appear each year. However, the laws of momentum and inertia always favor lighter dual sports for tight, rough trails. Heavier dual sports that emphasize rider comfort and the capacity to carry luggage are better choices for long highway trips.

Dual sports, by definition, are compromises - giving up some dirt performance to be ridden on the street and some street performance to be ridden in the dirt. The merits of a particular model can only be judged relative to the owner’s intended mix of dirt and street riding. Although aficionados may argue the merits of different models, all agree that versatile dual sports are desirable alternatives to more specialized motorcycles that can only be ridden in one environment.

Related Motorcycles

When dual-sports are fitted for long distance travel with accessories such as oversized gas tanks, luggage, and other distance-oriented gear, they are often referred to as an "adventure bikes". These motorcycles offer touring capabilities, but are less comfortable on long pavement trips than full fledged touring motorcycles such as the Honda Goldwing series.

A supermoto (also known as a supermotard or motard) is typically a converted motocross bike with less suspension travel, smaller front and rear wheel wheels (typically 17" at both ends), road tires and an oversized front brake designed to be primarily run on asphalt. When made street legal, these bikes may also be considered to be a type of dual sport. In this case, these motorbikes could be seen as somewhere between a sport bike and a dual-sport.

References

External links

* [http://dualsportmagazine.com/DualSport.html What is Dual Sport]