The History of the 1970 Yamaha 250 MX

Yamaha's DT 250 MX bike was a world-class motocross machine, and was available to the consumer market from 1968 through 1982.

  1. Performance

    • The Yamaha DT 250 engine featured a displacement of 246 cubic-centimeters, a size-able motor for a two-stroke, Reed-valve design. The DT 250 used an air-cooling system, giving it a longer operational time than a wet-cooling system. Power output was rated and advertised with 22.84 horsepower at 7,000 rpm and 12.9 foot-pounds of torque at 6,500 rpm. A five-speed, manual transmission was standard for gear shifting.

    Wheels

    • The front and rear wheels were both aluminum alloy. The front wheels were wrapped with 21-inch by 3-inch tires, while the rear wheels featured 18-inch by 4-inch tires. The front and rear wheels came from the factory with expanding brakes, which operate outward against the inside of the drum of the brake.

    Body

    • Wet weight of this bike was about 284 pounds, which included all fluids and a full tank of fuel. Fuel capacity was 2.38 gallons. This bike was available in red/black and orange/black.