YAMAHARD 125 1973 - 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).