Yamaha U7E Specs
The Yamaha U7E model is a Scooter bike manufactured by Yamaha . In this version sold from year 1973 , the dry weight is 77.0 kg (169.8 pounds) and it is equiped with a Single cylinder, two-stroke motor. The engine produces a maximum peak output power of 4.90 HP (3.6 kW) @ 6500 RPM and a maximum torque of 6.37 Nm (0.6 kgf-m or 4.7 ft.lbs) @ 4500 RPM . With this drive-train, the Yamaha U7E is capable of reaching a maximum top speed of 85.0 km/h (52.8 mph) . Regarding the chassis characteristics, responsible for road holding, handling behaviour and ride confort, the Yamaha U7E have a frame with front suspension being and in the rear suspension it is equiped with . Stock tire sizes are on the front, and on the rear. As for stopping power, the Yamaha U7E braking system includes size at the front and size at the rear.
Yamaha U7E General Information
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| Brand |
Yamaha |
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| Model |
Yamaha U7E |
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| Year |
1973 |
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| Year |
1973 |
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| Category |
Scooter |
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| Factory Warranty (Years / miles) |
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Yamaha U7E Dimensions, Aerodynamics and weight
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| Frame type |
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| Seat details |
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| Wheelbase |
1,175 mm (46.3 inches) |
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| Length |
1,840 mm (72.4 inches) |
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| Width |
645 mm (25.4 inches) |
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| Height |
1,005 mm (39.6 inches) |
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| Seat Height |
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| Alternate Seat Height |
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| Ground Clearance |
135 mm (5.3 inches) |
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| Trail size |
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| Wheels details |
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| Front Tyres - Rims dimensions |
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| Rear Tyres - Rims dimensions |
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| Front brakes |
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| Rear brakes |
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| Front Brakes Dimensions - Disc Dimensions |
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| Rear Brakes Dimensions - Disc Dimensions |
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| Curb Weight (including fluids) |
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| Dry Weight |
77.0 kg (169.8 pounds) |
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| Front Percentage of Weight |
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| Rear Percentage of Weight |
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| Weight-Power Output Ratio : |
0.0636 HP/kg |
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| Fuel Tank Capacity |
4.50 litres (1.19 gallons) |
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| Reserve Fuel Capacity |
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| Carrying Details and Capacity |
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| Front Suspension |
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| Front Suspension Travel |
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| Rear Suspension |
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| Rear Suspension Travel |
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Yamaha U7E Engine and Transmission Technical Data
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| Engine type - Number of cylinders |
Single cylinder, two-stroke |
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| Engine details |
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| Fuel system |
Carburettor |
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| Engine size - Displacement - Engine capacity |
72.00 ccm (4.39 cubic inches) |
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| Bore x Stroke |
47.0 x 42.0 mm (1.9 x 1.7 inches) |
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| Compression Ratio |
6.8:1 |
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| Number of valves per cylinder |
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| Camshaft Valvetrain Configuration |
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| Maximum power - Output - Horsepower |
4.90 HP (3.6 kW) @ 6500 RPM |
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| Maximum torque |
6.37 Nm (0.6 kgf-m or 4.7 ft.lbs) @ 4500 RPM |
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| Engine Maximum RPM |
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| Cooling system |
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| Lubrication system |
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| Engine oil capacity |
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| Exhaust system |
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| Gearbox |
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| Transmission type, final drive ratio |
Chain |
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| Clutch type |
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| Driveline |
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Yamaha U7E Performance
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| Top Speed |
85.0 km/h (52.8 mph) |
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| Acceleration 0 to 100 km/h (0 to 62 mph) |
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| Acceleration 0 to 400m (1/4 mile) |
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| Recuperation 60 to 140 km/h in highest gear |
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| Fuel Consumption - MPG - Economy - Efficiency |
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| CO2 emissions |
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| Emissions |
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Yamaha U7E Electrical Systems, Ignition and Equipment
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| Ignition Type |
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| Electrical Details |
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| Starter Type |
Electric & kick |
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| Instruments |
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| Lights |
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