These are the known mechanical and performance specifications for your 1975 Yamaha GT80 B.
Basic Specs
Engine
Displacement72.00 ccm (4.39 cubic inches)
Type
DetailsSingle cylinder, two-stroke
Max RPM8000
Compression6.0:1
Bore/Stroke47.0 x 42.0 mm (1.9 x 1.7 inches)
Valves/Cylinder
FuelingCarburettor. Teikei
IgnitionPoints type Ignition
ExhaustSingle tuned pipe
LubricationAuto Lube
CoolingAir
Performance
Horespower4.90 HP (3.6 kW)
Torque6.10 Nm (0.6 kgf-m or 4.5 ft.lbs)
Top Speed91.0 km/h (56.5 mph)
Fuel Economy & Polution
Fuel Consumption
Fuel Capacity4.92 litres (1.30 gallons)
Emissions
Chassis
Frame TypeSteel
Rake32.0°
Trail
Front SuspensionInverted forks
Front Travel102 mm (4.0 inches)
Rear Suspensionnon-adjustable dual shock
Rear Travel76 mm (3.0 inches)
Seat
Seat Height
Alt. Seat Height
Total Height
Total Length
Total Width
Ground Clearance
Wheelbase
Dry Weight59.0 kg (130.0 pounds)
Wet Weight60.3 kg (133.0 pounds)
Wheels & Brakes
Front Tire/Tyre2.50-15
Rear Tire/Tyre2.75-14
Front BrakesExpanding brake (drum brake)
Front Brake Diameter127 mm (5.0 inches)
Rear BrakesExpanding brake (drum brake)
Rear Brake Diameter127 mm (5.0 inches)
Wheels
Comments