BMW Motorrad introduced their G series as an enduro line of motorcycles. While other lines have enduro capable motorcycles, the BMW G series is focused entirely on enduro bikes. All 2010 BMW G series of motorcycles are street legal, and share the trait of using single-cylinder engines. Several versions are available, including the GS for dual sport bikes, and the X series for heavier dirt bike models.
In 2010, BMW Motorrad used two basic engines for their single-cylinder G series. The smaller engine, used on the G450X, is a 450cc four-stroke that produces 41 horsepower, and 31.6 ft. lbs. of torque at 6,500 rpm. The larger engine, a 652cc four-stroke that generates around 53 horsepower and 44 ft-lbs. of torque at 5,250 rpm, is used on the G650GS and the G650X bikes. These numbers are not as impressive on paper compared to bikes like the BMW S1000RR, but considering how light these enduro bikes are, and that they will mostly be ridden across challenging off-road conditions, these single-cylinder engines provide plenty of power for their intended use.
The 2010 G450X represents BMW’s most unconventional entry into the competitive dirt bike market. This bike is unconventional because BMW engineered a bike with unique traits shared by none of its competitors. The G450X places the countershaft sprocket and the sidearm on the same pivot, which ensures uniform chain tension at all times, resulting in smoother power delivery. The swingarm is 30mm longer than on any other bike, which assists stability. BMW positioned the engine closer to the center of the bike, which kept the bike’s mass centralized. This design choice aids in stability. The clutch is located at the end of the crankshaft, which translates into less heat and stress on the plate. And if all that is not enough, the engine even spins backwards from all other dirt bikes. All this innovative engineering adds up to the 2010 BMW G450X feeling lighter and more nimble than other bikes in the 450cc dirt bike class.
When BMW introduced the F650GS as its entry-level dirt bike, the G650GS was conceived as a slightly more upmarket entry into the dirt bike market. With a lower seat than most enduro bikes, the twin-cylinder F650GS was ideally suited for beginners, shorter riders, and female riders. BMW classifies the single-cylinder G650GS as a dual-sport bike capable of handling off-road conditions. The G650GS uses proven vendors such as Brembo for brakes, Showa for suspension, and Boge for shocks. Assisted by a fuel tank placed under the engine for a lower center of gravity, the lean G650GS handles well both on and off-road. It might be hard to find a G650GS, however, as it was only available in a select few countries.
If you crave off-road performance but still want to ride the same bike on the streets, then the 2010 BMW G650X series offers several enticing options. While street legal and able to perform well on the asphalt, the three G650X models (Xchallenge, Xcountry, and Xmoto) are also fully equipped dirt bikes. Capable of handling desert and mountain terrain as well as freeways, these models offer only slight differences in enduro capabilities. All three models are based on a steel bridge tubular frame, which provides excellent stability. All three come powered by the 652cc single-cylinder, which generates plenty of torque for off-roading. The Xchallenge is the most off-road capable, using a 21-inch wire spoke front wheel, and additional off-road tuned suspension. The Xcountry is the next most capable model, with a 19-inch wire spoke front wheel. The Xmoto is the most street focused, using 17-inch cast aluminum wheels with Pirelli street tires.
If you are a dedicated dirt biker who wants a stylish bike that handles streets as well as mountain trials, then the BMW G series has what you need.