Suzuki GS 650G Katana (1981-82)

Posted on by

The Suzuki GS 650G Katana motorcycle was produced between 1981 and 1982. It has a four-stroke, transverse four-cylinder engine with two valves per cylinder and a capacity of 673 cc. The bore and stroke measure 62 x 55.8 mm, and the compression ratio is 9.4:1. The bike features air-cooled cooling and 4 x 32 mm Mikuni BS32SS CV carburetors for induction. It has a transistorized ignition system, and the ignition timing is 10 o BTDC below 1650 rpm and 40 o BTDC above 3500 rpm. The spark plugs are NGK D8EA (E-01, 24, and 34) or NGK DR8ES-L (the others), with a gap of 0.6-0.7 mm. The bike has a 12V 50.4 kC (14Ah)/10HR battery and electric starting.

The Suzuki GS 650G Katana has a maximum power of 53.2 kW / 73 hp at 9400 rpm and a maximum torque of 57 Nm / 5.8 kgf-m / 42 lb-ft at 8000 rpm. It has a five-speed transmission and a shaft final drive with a primary reduction of 1.956 (90/46) and a secondary reduction of 0.941 (16/17). The bike has a front air-assisted telescopic fork suspension with 150 mm / 5.9 in of wheel travel and a rear dual-shock suspension with 110 mm / 4.2 in of wheel travel. It has front and rear brakes consisting of 2 x 275mm discs and a single 275mm disc, respectively. The front tire is 3.25 H19, and the rear tire is 4.25H 17.

The Suzuki GS 650G Katana has a length of 2180 mm / 85.8 in, a width of 730 mm / 28.7 in, and a height of 1120 mm / 44.1 in. Its wheelbase is 1480 mm / 58.3 in, and its ground clearance is 160 mm / 6.3 in. The bike has a seat height of 780 mm / 30.7 in and a dry weight of 218 kg / 484 lbs. It has a fuel capacity of 23 L / 6.1 US gal / 5.1 Imp gal and an average fuel consumption of 5.6 L/100 km / 18.0 km/l / 42.3 US mpg / 50.8 Imp mpg. The bike has a standing quarter-mile time of 13.2 seconds and a top speed of 200 km/h / 124 mph.

Technical specifications:

Make Model: Suzuki GS 650G Katana

Year: 1981 – 82


Engine: Four stroke, transverse four cylinders, DOHC, 2 valves per cylinder.
Capacity: 673 cc / 41 cu in
Bore x Stroke: 62 x 55.8 mm
Compression Ratio: 9.4:1
Cooling System: Air cooled
Induction: 4 x 32 mm Mikuni BS32SS CV carburetors
Ignition: Transistorized
Ignition timing: 10 o BTDC below 1650 rpm / 40 o BTDC above 3500 rpm
Spark Plug: NGK D8EA (E-01, 24 & 34) NGK DR8ES-L (the others) – gap 0.6-0.7 mm (0.024-0.028 in)
Battery: 12V 50.4 kC (14Ah)/10HR – type YB14L-A2
Starting: Electric
Generator: Three-phase A.C. generator
Max Power: 53.2 kW / 73 hp @ 9400 rpm
Max Torque: 57 Nm / 5.8 kgf-m / 42 lb-ft @ 8000 rpm
Transmission: 5 Speed

Final Drive: Shaft
Primary Reducation: 1.956 (90/46)
Secondary Reducation: 0.941 (16/17)
Gear Ratios: 1st 2.678 (36/14) x (25/24) / 2nd 1.851 (32/18) x (25/24) / 3th 1.438 (29/21) x (25/24) / 4th 1.171 (27/24) x (25/24) / 5th 1.000 (Direct)
Final Reducation: 3.090 (34/11)
Front Suspension: Air assisted telescopic fork
Front Wheel Travel: 150 mm / 5.9 in
Rear Suspension: Dual shocks, 5-way preload and 4-way damping
Rear Wheel Travel: 110 mm / 4.2 in
Front Brakes: 2 x 275mm discs, 1 piston calipers
Rear Brakes: Single 275mm disc, 1 piston caliper
Front Tyre: 3.25 H19
Rear Tyre: 4.25H 17
Rake: 40o
Trail: 113 mm . 4.3 in
Dimensions: Length: 2180 mm / 85.8 in Width: 730 mm / 28.7 in Height: 1120 mm / 44.1 in
Wheelbase: 1480 mm / 58.3 in
Ground Clearance: 160 mm / 6.3 in
Seat Height: 780 mm / 30.7 in
Dry Weight: 218 kg / 484 lbs

Fuel Capacity: 23 L / 6.1 US gal / 5.1 Imp gal
Consumption Average: 5.6 L/100 km / 18.0 km/l / 42.3 US mpg / 50.8 Imp mpg
Standing 1/4 Mile: 13.2 sec / 162 km/h / 101 mph
Top Speed: 200 km/h / 124 mph

Related models: