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The Suzuki GT 550 was part of their famous GT (Grand Touring) series from the 1970s, which included the GT750 and GT380. Manufactured for six years (1972 to ’77), the GT550 was available in 6 different models, starting with the 1972 GT550J and ending with the 1977 GT550B. As a result, each year the motorcycle came with improved features, although the main specifications remained almost unchanged. In total, more than 60,000 units of this touring bike were sold worldwide, making it one of the most popular high-end Suzuki machines of its time.
At the heart of the Suzuki GT550 was a powerful 543cc engine that was one of the first three-cylinder two-stroke motorcycles to be seen on UK roads. Drawing heavily on technologies developed for Suzuki racing motorcycles, the GT550 incorporated several unique features. One of these was the ram air control system, which forced airflow over the internal cylinders, helping to keep operating temperatures in check. This was important as Suzuki realized that two-strokes lose power quickly when overheated, which would affect any touring experience. As a result, the Suzuki GT550 was one of the first large two-stroke motorcycles that could comfortably cruise for several hours at a time. It also featured automatic fuel and oil mixing and visible emission control.
The Suzuki GT550’s engine made 48.5 hp at 6500 rpm (improved to 53 hp in later models), which gave it enough oomph for the big 440-pound bike. On the open road, riders can use the 5-speed constant mesh transmission to achieve top speeds in excess of 100mph, putting this bike on par with even more powerful street bikes. Earlier models came with only drum brakes, although Suzuki quickly adopted a disc brake for safer braking. The long wheelbase and stable suspension made the GT550 quite stable and manageable for its size, enhancing the driving experience.
Although the Suzuki GT550 was a popular touring bike throughout the 1970s, some of its glory was taken away by the more glamorous GT750, which entered several races. As a result, most collectors and enthusiasts would prefer other GTs, although there is still a strong and loyal following for this brilliant design. It can be difficult to find genuine replacement parts, so always check with reputable dealers. After all, with the correct care and maintenance, a Suzuki GT550 still offers performance to rival many of today’s production bikes!