Classic and Classy Motorcycles Ltd

Historical Context

The 1975 Suzuki GT750M was part of Suzuki’s groundbreaking GT750 series—the first mass-produced liquid-cooled motorcycle from a Japanese manufacturer. Introduced in 1971 and produced until 1977, the GT750 was aimed at the sport-touring market and gained instant notoriety for its smooth ride, advanced engineering, and imposing size. Known affectionately as the “Water Buffalo” in the U.S. and the “Kettle” in the UK, the GT750 challenged conventional two-stroke design by incorporating water cooling and a triple-cylinder engine, features more commonly found in four-strokes of the era. By 1975, the model had undergone several refinements, and the GT750M version represented a well-developed, mature iteration of this iconic machine.

Technical Specifications and Features

• Year: 1975
• Make: Suzuki
• Model: GT750M
• Engine Displacement: 738cc
• Engine Type: Liquid-cooled, two-stroke, inline 3-cylinder
• Compression Ratio: 7.2:1
• Power Output: Approximately 67 horsepower
• Torque: Around 56 lb-ft
• Transmission: 5-speed manual
• Brakes: Twin front disc, single rear disc
• Fuel System: Triple Mikuni carburetors
• Fuel Capacity: 5.0 gallons
• Wheelbase: 59 inches
• Dry Weight: Approximately 540 pounds
• Top Speed: Around 110 mph
• Key Features: Liquid cooling, SRIS (Suzuki Recycle Injection System), Ram Air-style cylinder head design, triple exhaust system.

Project Potential

The GT750M makes for a rewarding and collectible restoration project. With its distinctive triple exhaust, bulky presence, and liquid-cooled engine, a properly restored example turns heads at any vintage show or café. Parts availability remains relatively strong thanks to a devoted enthusiast base and specialist suppliers. Restoring one typically involves carburetor rebuilding, attention to the water pump and cooling system, and refinishing chrome or paintwork to match the factory finish. Customizing these bikes is less common due to their collectibility, but some riders opt for mild café or sport-touring enhancements.

Riding Experience

Once restored, the GT750M offers a unique ride. The liquid-cooled engine is noticeably smooth and quiet for a two-stroke, and the powerband is broad and usable thanks to its torque-rich delivery. It excels at relaxed touring speeds rather than aggressive acceleration, though its performance was still impressive for the time. The triple-disc brake setup (an upgrade introduced in 1973) provides capable stopping power. At over 500 pounds dry, it’s a heavy bike, but the handling is balanced and predictable. It was considered an excellent long-distance cruiser in its day—and remains comfortable even by modern standards.

Legacy and Collectibility

The 1975 GT750M holds a special place in motorcycle history as a technical pioneer. Its liquid cooling and advanced oil injection system showed that two-strokes could evolve into capable touring machines. While overshadowed in outright performance by four-stroke rivals like the Honda CB750, the GT750 was ahead of its time and is now highly prized among collectors. The M version is particularly desirable due to its refined mechanics and improved braking system. Restoring a GT750M is both a nod to Suzuki’s innovation and a way to keep one of the most fascinating bikes of the 1970s alive and on the road.