Japanese multinational corporation Kawasaki has been a prolific manufacturer of motorcycles ever since it entered the industry in the 1960s. Its motorcycles have gained global popularity, and Kawasaki is considered one of the "Big Four" Japanese motorcycle brands alongside Honda, Suzuki, and Yamaha.

In the six-plus decades Kawasaki has been around, the company has launched several successful motorcycles. The most notable ones among these include the Kawasaki H2R, the ZX-10R, the Kawasaki H1 Mach III, and the Kawasaki ZX-14R. Today, Kawasaki sells several motorcycles across different categories. These machines vary in terms of size, engine type, and fuel capacity, with the largest tanks being found on machines that are meant for long-distance touring. The company's dual sport motorcycle, the Kawasaki KLR 650, may not be the most powerful machine in Kawasaki's current lineup, but it comes out on top in one aspect: fuel tank capacity. Thanks to its massive 6.1-gallon (23-liter) fuel tank, the KLR 650 currently has the largest fuel tank of any Kawasaki production motorcycle.

Interestingly, the KLR 650's gas tank capacity is comparable to modern-day Harley-Davidson motorcycles with the largest fuel tanks. However, even the KLR 650's massive fuel capacity pales in comparison to the Kawasaki Concours ZG1000, a sport tourer from Kawasaki manufactured between 1986 and 2006. This motorcycle came with a gargantuan 7.5-gallon (28-liter) fuel tank, making it the largest ever fuel tank on a Kawasaki.