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Yamaha GT80 B Specs

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The Yamaha GT80 B model is a Enduro / offroad bike manufactured by Yamaha . In this version sold from year 1975 , the dry weight is 59.0 kg (130.0 pounds) and it is equipped with a Single cylinder, two-stroke motor. The engine produces a maximum peak output power of 4.90 HP (3.6 kW) and a maximum torque of 6.10 Nm (0.6 kgf-m or 4.5 ft.lbs) @ 7200 RPM . With this drive-train, the Yamaha GT80 B is capable of reaching a maximum top speed of 91.0 km/h (56.5 mph) . On the topic of chassis characteristics, responsible for road holding, handling behavior and ride comfort, the Yamaha GT80 B has a Steel frame with front suspension being Inverted forks and at the rear, it is equipped with non-adjustable dual shock . Stock tire sizes are 2.50-15 on the front, and 2.75-14 on the rear. As for stopping power, the Yamaha GT80 B braking system includes Expanding brake (drum brake) size 127 mm (5.0 inches) at the front and Expanding brake (drum brake) size 127 mm (5.0 inches) at the back. 

Yamaha GT80 B General Information

Brand Yamaha 
Model Yamaha GT80 B 
Start year 1975 
Year 1975 
Category Enduro / offroad 
Factory Warranty (Years / miles)

Yamaha GT80 B Dimensions, Aerodynamics and weight

Frame type Steel 
Seat details
Seat Height
Alternate Seat Height
Ground Clearance
Trail size
Wheels details
Front Tyres - Rims dimensions 2.50-15 
Rear Tyres - Rims dimensions 2.75-14 
Front brakes Expanding brake (drum brake) 
Rear brakes Expanding brake (drum brake) 
Front Brakes Dimensions - Disc Dimensions 127 mm (5.0 inches) 
Rear Brakes Dimensions - Disc Dimensions 127 mm (5.0 inches) 
Curb Weight (including fluids) 60.3 kg (133.0 pounds) 
Dry Weight 59.0 kg (130.0 pounds) 
Front Percentage of Weight
Rear Percentage of Weight
Weight-Power Output Ratio : 0.0831 HP/kg 
Fuel Tank Capacity 4.92 litres (1.30 gallons) 
Reserve Fuel Capacity
Carrying Details and Capacity
Front Suspension Inverted forks 
Front Suspension Travel 102 mm (4.0 inches) 
Rear Suspension non-adjustable dual shock 
Rear Suspension Travel 76 mm (3.0 inches) 

Yamaha GT80 B Engine and Transmission Technical Data

Engine type - Number of cylinders Single cylinder, two-stroke 
Engine details
Fuel system Carburettor. Teikei 
Engine size - Displacement - Engine capacity 72.00 ccm (4.39 cubic inches) 
Bore x Stroke 47.0 x 42.0 mm (1.9 x 1.7 inches) 
Compression Ratio 6.0:1 
Number of valves per cylinder
Camshaft Valvetrain Configuration
Maximum power - Output - Horsepower 4.90 HP (3.6 kW) 
Maximum torque 6.10 Nm (0.6 kgf-m or 4.5 ft.lbs) @ 7200 RPM 
Engine Maximum RPM 8000 
Cooling system Air 
Lubrication system Auto Lube 
Engine oil capacity
Exhaust system Single tuned pipe 
Gearbox 4-speed 
Transmission type, final drive ratio Chain 
Clutch type Wet plate 

Yamaha GT80 B Performance

Top Speed 91.0 km/h (56.5 mph) 
Acceleration 0 to 100 km/h (0 to 62 mph)
Acceleration 0 to 400m (1/4 mile)
Recuperation 60 to 140 km/h in highest gear
Fuel Consumption - MPG - Economy - Efficiency
CO2 emissions

Yamaha GT80 B Electrical Systems, Ignition and Equipment

Ignition Type Points type Ignition 
Electrical Details
Starter Type Kick 
How much horsepower does a Yamaha GT80 B have?
The Yamaha GT80 B has 4.90 HP (3.6 kW).

How fast is a Yamaha GT80 B?
The Yamaha GT80 B top speed is 91.0 km/h (56.5 mph).

How much does a Yamaha GT80 B weighs?
The Yamaha GT80 B weighs 59.0 kg (130.0 pounds).

How many gears does a Yamaha GT80 B have?
The Yamaha GT80 B have 4 gears.