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Yamaha Racing History
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| General information |
|---|
| Model: | Yamaha TT-R90 E |
| Year: | 2004 |
| Category: | Minibike, cross |
| Engine and transmission |
|---|
| Displacement: | 89.00 ccm (5.43 cubic inches) |
| Engine type: | Single cylinder |
| Stroke: | 4 |
| Power: | 5.49 HP (4.0 kW)) @ 5600 RPM |
| Torque: | 6.10 Nm (0.6 kgf-m or 4.5 ft.lbs) @ 6500 RPM |
| Compression: | 8.5:1 |
| Bore x Stroke: | 47.0 x 51.8 mm (1.9 x 2.0 inches) |
| Fuel control: | SOHC |
| Cooling system: | Liquid |
Transmission type
final drive: | Chain |
| Physical measurements |
|---|
| Dry weight: | 60.0 kg (132.3 pounds) |
| Seat height: | 625 mm (24.6 inches) If adjustable, lowest setting. |
| Overall height: | 865 mm (34.1 inches) |
| Overall length: | 1,525 mm (60.0 inches) |
| Overall width: | 605 mm (23.8 inches) |
| Ground clearance: | 172 mm (6.8 inches) |
| Wheelbase: | 1,040 mm (40.9 inches) |
| Chassis and dimensions |
|---|
| Front Suspension: | Telescopic fork |
| Front Suspension travel: | 110 mm (4.3 inches) |
| Rear Suspension: | Swinging arm (monocross) |
| Rear Suspension travel: | 95 mm (3.7 inches) |
| Front brakes: | Expanding brake (drum brake) |
| Front brakes diameter: | 95 mm (3.7 inches) |
| Rear brakes: | Expanding brake (drum brake) |
| Rear brakes diameter: | 110 mm (4.3 inches) |
| Speed and acceleration |
|---|
| Power/weight ratio: | 0.0915 HP/kg |
| Other specifications |
|---|
| Color options: | Blue |
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