The Yamaha DT 125 was a dual-purpose enduro motorcycle made by Yamaha in 1874, continuing production until 2008. The bike debuted in 1974 as the DT 125A and ran through 2008. It was last seen as the DT 125H in the American market in 1981.
Over its lifetime, the motorcycle received numerous upgrades and modifications, including a single shock absorber and a swingarm introduced in 1977. The maker called it Mono-Cross (MX for short).
Another significant modification was made in 1982, gaining a major restyle and a new liquid-cooled system, all under the DT 125LC designation. In 1984, the bike's electric system was upgraded to 12V, the Yamaha Power Valve System (YPVS) was added, the front drum unit was changed with a disc, and a rising rate rear suspension system was installed.
In 1987, the manufacturer introduced the DT 125R, featuring another restyle, among other changes. The most notable modification was the introduction of a rear brake disc.
In 1991, the Japanese motorcycle manufacturer launched the Yamaha DT 125R, a dual-purpose motorcycle fitted with standard features, such as a rectangular headlight, a high-mounted front fender, hand guards, a one-piece dual seat with passenger grab handles, a small luggage rack, a high-mounted exhaust system, and wire-spoke wheels.
As for the power figures, the 1991 Yamaha DT 125R had installed a 123cc two-stroke liquid-cooled single-cylinder engine, boasting 14 hp at 6,500 rpm and 15 Nm (11 lb-ft) torque at 6,500 rpm.