1977 model year GS750s were manufactured in 1976 and have only 1 front disc brake. GS850 (G, GL) GS1000 (C, E, G, GL, L, N, S) all are 8-valve apart from the 1982 Katana GS(X)1000S) GS1100 (E, ES, G, GK, GL, L, Katana GS(X) 1100S) - All 16-valve engine powered machines were designated as the GSX 1100 outside the North American market GS1150 (E, EFE, EFF, EFG,) Designated as the GSX 1100 outside the US market GS1200SS Shaft drive models The G suffix after the model number indicates the model uses a shaft drive instead of the chain drive system. The G models included the GS650G and GL, GS750G and GL, GS850G and GL, GS1000G and GL, and GS1100G, GK, and GL. The G models were standard bikes with flat seats. The GL models were cruiser-style bikes with chrome fenders, smaller gas tanks, pull back handlebars, shorter exhausts, and stepped seats. The GS1100GK was a full-dress bike with factory fairing, trunk, and hard bags. The GS1000 and GS1100 shaft drive models had 8-valve engines while later GS1000S (Katana) and all GS1100 chain drive models had 16 valve engines. Suzuki utilized the 1980s GS1100G blueprint to design the 1991 GSX1100G, combining a shaft-drive chassis with a modified GSX-R1100 engine that had 16 valves breathing through Mikuni 'slingshot' carburetors (which have a throttle slide that is flat on one side and rounded on the other to generate less intake turbulence). References GS Series Motorcycles introduced in 1976