Segment: Clasic
Production years: 1973, 1974, 1975, 1976, 1977, 1978, 1979, 1980
The Yamaha RD 125 was a motorcycle manufactured by Yamaha from 1973 to 1990, with the RD designation that indicated its orientation for race development. The bike was largely similar to the AS3/AS2.
Compared to its predecessor, the RD 125 motorcycle had a teardrop-shaped fuel tank for a slimmer look, a 40 mm longer wheelbase, the air filter was moved under the side cover, and the oil filter neck under the seat.
In the visual department, the bike packed standard features, such as a round headlight with two instrument gauges mounted on top, a teardrop-shaped fuel tank, a two-piece dual seat, a dual exhaust system with a muffler on each side, and lightweight wire-spoke wheels.
The bike was built around a steel tube frame with a 28 mm telescopic fork on the front and a 150 mm drum braking unit. In contrast, the rear end was handled by preload-adjustable side-mounted shocks and a 130 mm drum unit.
As for the power figures, the 1973 Yamaha RD 125 had its soul brought to life by a 124cc two-stroke parallel-twin air-cooled engine, managed by two Teikei carburetors, delivering an output power of 17 hp with maximum strength at 8,500 rpm and 13 Nm (10 lb-ft) torque at 8,000 rpm.
The bike's engine was coupled to a five-speed manual transmission, sending the power to the rear wheel through a final chain drive, pushing the small motorcycle to 130 kph (81 mph).
engine specs | Type: | Parallel twin cylinder, two stroke, air-cooled | Displacement: | 124 cm3 | Bore X Stroke: | 1.7x1.7 in OR 43 mm | Compression Ratio: | 6.8:1 | Horsepower: | 17/8500 KW(hp)/RPM | Torque: | 10/8000 lb-ft/RPM OR 14/8000 Nm/RPM | Fuel System: | Carburetors |
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transmission specs | Gearbox: | 5-Speed | Clutch: | Wet multi-plate | Primary Drive: | - | Final Drive: | Chain |
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chassis specs | Frame: | Steel tube | Front Suspension: | Telescopic forks | Rear Suspension: | Dual rear shock preload adjustable | Front Brake: | Drum | Rear Brake: | Drum |
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dimension specs | Overall Length: | - | Overall Width: | - | Seat Height: | 29.5 in OR 749 mm | Wheelbase: | 49 in OR 1245 mm | Ground Clearance: | - | Weight: | 254 lbs OR 115 kg | Fuel Capacity: | 3 gallons OR 11.4 L |
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tyres specs | Front: | 2.75-18 | Rear: | 3.00-18 |
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power system specs | Power pack: | - | Nominal Capacity: | - | Maximum Capacity: | - | Charger type: | - | Charging time (normal): | - | Charging time (quick): | - | Range: | - |
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