INFORMATION
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Yamaha Racing History
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| General information |
|---|
| Model: | Yamaha U7E |
| Year: | 1972 |
| Category: | Scooter |
| Engine and transmission |
|---|
| Displacement: | 72.00 ccm (4.39 cubic inches) |
| Engine type: | Single cylinder |
| Stroke: | 2 |
| Power: | 4.90 HP (3.6 kW)) @ 6500 RPM |
| Compression: | 6.8:1 |
| Bore x Stroke: | 47.0 x 42.0 mm (1.9 x 1.7 inches) |
| Cooling system: | Air |
| Gearbox: | 3-speed |
| Physical measurements |
|---|
| Dry weight: | 77.0 kg (169.8 pounds) |
| Chassis and dimensions |
|---|
| Front tyre dimensions: | 225-17 |
| Rear tyre dimensions: | 250-17 |
| Front brakes: | Expanding brake (drum brake) |
| Rear brakes: | Expanding brake (drum brake) |
| Speed and acceleration |
|---|
| Top speed: | 85.0 km/h (52.8 mph) |
| Power/weight ratio: | 0.0636 HP/kg |
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