Yamaha DX 250

 

 

 

Make Model

Yamaha DX 250

Year

1970

Engine

Two stroke, single cylinder

Capacity

247 cc / 15.0 cu-in
Bore x Stroke 54 х 54 mm
Cooling System Air cooled
Compression Ratio 6.7:1

Induction

Carburetor

Ignition 

Flywheel magneto 
Starting Kick

Max power

30 hp / 22 kW @ 7200 rpm

Max Torque

28.6 Nm / 2.92kgf-m @ 7000 rpm

Transmission 

6 Speed
Final Drive Chain

Front Suspension

Telescopic forks

Rear Suspension

Dual shocks

Front Brakes

Drum

Rear Brakes

Drum

Front Tyre

3.00-18

Rear Tyre

3.50-18

Dry Weight

138 kg / 304.2 lbs

Fuel Capacity

 

This model was the 250cc version of the sport model RX350 released in April of the same year. Its newly designed 2-cylinder engine featured a 5-port layout, "Autolube" oil supply system and twin carburetors, and was mounted on a double cradle type frame made of high-tensile steel as on Yamaha's production racers. The un-sprung components included a Ceriani type front fork with an aluminum bottom case, a 3-way adjustable rear cushioning unit and completely dust- and water-proof drum brakes. It achieved light and agile handling that set a new standard for sport bikes of the time.