GT550 History


All the images and text on this page have been researched by Jarmo Haapamäki. His website www.suzukicycles.org is an invaluable resource to anyone wanting to know about Suzuki motorcycles.


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Suzuki introduced a trio of three-cylinder two-strokes in 1972: the air-cooled triples GT380 and GT550 and the new flagship, the liquid-cooled GT750. Both of the air-cooled models featured Suzuki new patented Ram Air cooling system that forced cool air under an aluminum shield mounted on the top of the cylinder heads and improve cooling. The system really worked and the GT models didn't suffer from the problems that usually are attached to air-cooled two-strokes: overheating engines and loosing power as a result of it. According to the test rides from those days the GT380 and GT550 delivered the same amount of power even after hard use. You can read more of the Ram Air Cystem on a GT550 road test, published in Cycle World, Jan 1973.

The GT380 had six gears but the GT550 with its wider power range worked just fine with its 5-speed gearbox. The GT550 (called Indy in the USA). The model was sold until the introduction of four-stroke GS550 in 1977.


1972 Suzuki year code: J

At first the GT550 had drum brakes a disc brake was introduced already during its first model year (see the pictures). The GT550 wasn't as fast as its big brother but it was a perfect compromise between the GT380 and GT750. The low-mounted exhaust pipes decreased the ground clearance significantly in the curves and the the suspension was quite soft (as in most Suzukis in the early seventies) but othervise the GT550 was smooth, fast and durable. The Suzuki engineers had done a fine job with it.

After the introduction of the disc brake at front, the model didn't go through any significant upgrades, expept for the paintjob.

Colors available: Blue, Gold

GT550 J - 1972

GT 550 J 1972
Overall Length: 2,195 mm (86.4 in)
Overall Width: 815 mm (32.1 in)
Overall Height: 1,160 mm (45.7 in)
Wheelbase: 1,460 mm (57.7 in)
Weight: 215 kg (477 lbs)
Engine type: Air-cooled 543 cc inline-3, 2-stroke. 50 hp / 6,500 rpm, 5.5 kg-m/ 6,000 rpm.

GT550 J - 1972

GT 550 J 1972
Overall Length: 2,195 mm (86.4 in)
Overall Width: 815 mm (32.1 in)
Overall Height: 1,160 mm (45.7 in)
Wheelbase: 1,460 mm (57.7 in)
Weight: 215 kg (477 lbs)
Engine type: Air-cooled 543 cc inline-3, 2-stroke. 50 hp / 6,500 rpm, 5.5 kg-m/ 6,000 rpm.


1973 Suzuki year code: K

Colors available: Green Lime Metallic and Purple Blue Metallic (Hermosa Blue), Gold.

GT550 K - 1973

GT 550 K 1973
Overall Length: 2,195 mm (86.4 in)
Overall Width: 815 mm (32.1 in)
Overall Height: 1,160 mm (45.7 in)
Wheelbase: 1,460 mm (57.7 in)
Weight: 215 kg (477 lbs)
Engine type: Air-cooled 543 cc inline-3, 2-stroke. 50 hp / 6,500 rpm, 5.5 kg-m/ 6,000 rpm.

GT550 K - 1973

GT 550 K 1973
Overall Length: 2,195 mm (86.4 in)
Overall Width: 815 mm (32.1 in)
Overall Height: 1,160 mm (45.7 in)
Wheelbase: 1,460 mm (57.7 in)
Weight: 215 kg (477 lbs)
Engine type: Air-cooled 543 cc inline-3, 2-stroke. 50 hp / 6,500 rpm, 5.5 kg-m/ 6,000 rpm.

GT550 K - 1973

GT 550 K 1973
Overall Length: 2,195 mm (86.4 in)
Overall Width: 815 mm (32.1 in)
Overall Height: 1,160 mm (45.7 in)
Wheelbase: 1,460 mm (57.7 in)
Weight: 215 kg (477 lbs)
Engine type: Air-cooled 543 cc inline-3, 2-stroke. 50 hp / 6,500 rpm, 5.5 kg-m/ 6,000 rpm.


1974 Suzuki year code: L

Colors available: Hawaii Green, Marble Scarlet (Laredo Red or Marble Red), Silver

GT550 L - 1974

GT 550 L 1974
Overall Length: 2,195 mm (86.4 in)
Overall Width: 815 mm (32.1 in)
Overall Height: 1,160 mm (45.7 in)
Wheelbase: 1,460 mm (57.7 in)
Weight: 215 kg (477 lbs)
Engine type: Air-cooled 543 cc inline-3, 2-stroke. 50 hp / 6,500 rpm, 5.5 kg-m/ 6,000 rpm.

GT550 L - 1974

GT 550 L 1974
Overall Length: 2,195 mm (86.4 in)
Overall Width: 815 mm (32.1 in)
Overall Height: 1,160 mm (45.7 in)
Wheelbase: 1,460 mm (57.7 in)
Weight: 215 kg (477 lbs)
Engine type: Air-cooled 543 cc inline-3, 2-stroke. 50 hp / 6,500 rpm, 5.5 kg-m/ 6,000 rpm.


1975 Suzuki year code: M

Colors available: Grey Metallic, Candy Orange, Gloss Black

GT550 M - 1975

GT 550 M 1975
Overall Length: 2,195 mm (86.4 in)
Overall Width: 815 mm (32.1 in)
Overall Height: 1,160 mm (45.7 in)
Wheelbase: 1,460 mm (57.7 in)
Ground Clearance: 145 mm (5.7 in)
Weight: 215 kg (477 lbs)
Engine type: Air-cooled 543 cc inline-3, 2-stroke. 50 hp / 6,500 rpm, 5.5 kg-m/ 6,000 rpm.


1976 Suzuki year code: A

Colors available: Forest Green, Targa Red, Candy Rose

GT550 A - 1976

GT 550 A 1976
Overall Length: 2,195 mm (86.4 in)
Overall Width: 815 mm (32.1 in)
Overall Height: 1,160 mm (45.7 in)
Wheelbase: 1,460 mm (57.7 in)
Ground Clearance: 145 mm (5.7 in)
Dry Weight: 200 kg (441 lbs)
Engine type: Air-cooled 543 cc inline-3, 2-stroke. 50 hp / 6,500 rpm, 5.5 kg-m/ 6,000 rpm.

GT550 A - 1976

GT 550 A 1976
Overall Length: 2,195 mm (86.4 in)
Overall Width: 815 mm (32.1 in)
Overall Height: 1,160 mm (45.7 in)
Wheelbase: 1,460 mm (57.7 in)
Ground Clearance: 145 mm (5.7 in)
Dry Weight: 200 kg (441 lbs)
Engine type: Air-cooled 543 cc inline-3, 2-stroke. 50 hp / 6,500 rpm, 5.5 kg-m/ 6,000 rpm.


1977 Suzuki year code: B

Colors available: Metallic Blue, Spark Silver

GT550 B - 1977

GT 550 B 1977
Overall Length: 2,195 mm (86.4 in)
Overall Width: 815 mm (32.1 in)
Overall Height: 1,160 mm (45.7 in)
Wheelbase: 1,460 mm (57.7 in)
Ground Clearance: 145 mm (5.7 in)
Dry Weight: 200 kg (441 lbs)
Engine type: Air-cooled 543 cc inline-3, 2-stroke. 50 hp / 6,500 rpm, 5.5 kg-m/ 6,000 rpm.

GT550 B - 1977

GT 550 B 1977
Overall Length: 2,195 mm (86.4 in)
Overall Width: 815 mm (32.1 in)
Overall Height: 1,160 mm (45.7 in)
Wheelbase: 1,460 mm (57.7 in)
Ground Clearance: 145 mm (5.7 in)
Dry Weight: 200 kg (441 lbs)
Engine type: Air-cooled 543 cc inline-3, 2-stroke. 50 hp / 6,500 rpm, 5.5 kg-m/ 6,000 rpm.