Yamaha YD1 250 (1957)

The Yamaha YD-1 250 motorcycle was first produced in 1957. It has a two-stroke, piston-port parallel twin engine with a capacity of 247 cc/15.0 cu-in. The bore and stroke measure 54 x 54 mm and it is air-cooled with a compression ratio of . The bike starts with a kick and has a maximum power of 14.5 hp at 6000 rpm and maximum torque of 4.1 kg-m at 5000 rpm. The transmission is a 5-speed with a final chain drive. The front suspension is telescopic forks and the rear suspension is swing arm. The brakes for both the front and rear wheels are drum brakes. The front and rear tires are both 2.50 -16. The bike has a wet weight of 138 kg/309 lbs and fuel capacity is not specified in the provided information.

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Technical specifications:

Make Model: Yamaha YD-1

Year: 1957

Engine: Two stroke, piston-port, parallel twin

Capacity: 247 cc / 15.0 cu-in

Bore x Stroke: 54 x 54 mm

Cooling System: Air-cooled

Compression Ratio:

Induction: Single carburetor

Starting: Kick

Max Power: 14.5 hp @ 6000 rpm

Max Torque: 4.1 kg-m @ 5000 rpm

Transmission: 5 Speed

Final Drive: Chain

Front Suspension: Telescopic forks

Rear Suspension: Swing arm

Front Brakes: Drum

Rear Brakes: Drum

Front Tyre: 2.50 -16

Rear Tyre: 2.50 -16

Wet Weight: 138 kg / 309 lbs

Fuel Capacity: