| MODEL | SUZUKI GT 380B 1977 |
| Year | 1977 |
| Engine Type | Two-stroke, transverse three-cylinder |
| Displacement / Capacity | 371 cc / 22.6 cu in |
| Bore X Stroke | 54 x 54 mm |
| Compression Ratio | 7.2:1 |
| Cooling System | Air-cooled |
| Max Power | 27.7 kW / 38 hp @ 7500 rpm |
| Max Torque | 38 Nm / 3.9 kgf-m / 28 lb-ft @ 6000 rpm |
| Ignition | Battery and coil |
| Induction | 3 x 24 mm Mikuni carburettors |
| Start System | Kick |
| TRANSMISSION SPECS | |
| Lubrication | — |
| Gear Box | 6-speed |
| Clutch | Wet, multiplate |
| Final Drive | Chain |
| CHASSIS SPECS | |
| Frame | Tube frame |
| Front Suspension | Telescopic fork, oil damped |
| Rear Suspension | Dual shocks, springs, 5-way adjustable |
| Front Brakes | Single 275 mm disc |
| Rear Brakes | 180 mm drum |
| DIMENSION SPECS | |
| Overall Length | 2090 mm / 82.3 in |
| Overall Width | 815 mm / 32.1 in |
| Overall Height | 1125 mm / 44.3 in |
| Seat Height | 787 mm / 31 in |
| Wheelbase | 1379 mm / 54.3 in |
| Ground Clearance | 145 mm / 5.7 in |
| Dry Weight | — |
| Wet Weight | 171 kg / 377 lb |
| WHEEL SPECS | |
| Front Tyre | 3.00-19 4PR |
| Rear Tyre | 3.50-18 4PR |
| FUEL SYSTEM | |
| Fuel Capacity | 15 Litres / 4.0 US gal / 3.3 Imp gal |
| Fuel Consumption | — |
| Top Speed | 153 km/h / 95 mph |
The 1977 GT380B carried on the small three-cylinder two-stroke with only detail changes. It used Suzuki's CCI automatic oil injection, so there was no pre-mixing of fuel and oil, and kept the six-speed box and 275 mm front disc. It was among the last years of the air-cooled GT380 before four-strokes took over the class.
