The GS550 is equipped with a lightweight and compact 550 cm³ air-cooled 4-stroke 4-cylinder DOHC engine that generates maximum horsepower of 51 PS and maximum torque of 41.1 kg-m. This engine is paired with the first 6-speed transmission in its class. Combined with a low seat and a dry weight of only 198 kg, the GS550 is an easy-to-handle and highly maneuverable model. It also features a hydraulic single disc brake at the front wheel. The GS550E, which features star-shaped cast wheels, debuted in 1978.

Dimensions and weight	Dimensions	Overall length	2,175 mm
		Overall width	850 mm
		Overall height	1,155 mm
	Wheelbase		1,435 mm
	Weight		198 kg (Dry)
Engine	Engine type		4-stroke, 4-cylinder, air-cooled, DOHC
	Engine displacement		549 cm³
	Bore x stroke		56.0 mm × 55.8 mm
	Maximum power		37.5kW(51PS) / 9,000rpm
	Maximum torque		41.2N-m / 7,500rpm
Transmission			6-speed constant mesh
Front tire size			3.25H-19-4PR
Rear tire size			3.75H-18-4PR