1972 Yamaha DS7 250
A standard motorcycle from 1972, the 1972 Yamaha DS7 250 delivers 30hp from its 247cc 2-stroke twin engine.
Specifications
Engine
- Type
- 2-stroke twin
- Displacement
- 247 cc
- Cylinders
- 2
- Power
- 30 hp @ 7500 rpm
- Torque
- 24.0 Nm
- Compression
- —
- Bore × Stroke
- 56.0 × 50.0 mm
- Cooling
- Air-cooled
- Fuel System
- 2x Mikuni carburetors
Chassis & Transmission
- Frame
- Steel double cradle
- Front Suspension
- Telescopic fork
- Rear Suspension
- Twin shock
- Front Brake
- Drum
- Rear Brake
- Drum
- Front Tyre
- —
- Rear Tyre
- —
- Transmission
- 5-speed
- Final Drive
- Chain
Performance
- Top Speed
- 145 km/h (90 mph)
- ¼ Mile
- —
Dimensions & Weight
- Dry Weight
- 135 kg (298 lbs)
- Wet Weight
- 147 kg (324 lbs)
- Seat Height
- 780 mm
- Wheelbase
- 1310 mm
- Ground Clearance
- —
- Fuel Capacity
- 12.0 L
History & Story
When Yamaha unveiled the 1972 Yamaha DS7 250 in 1972, it signaled the company's commitment to the standard motorcycle segment. Built in Japan, this standard motorcycle embodied the spirit of 1970s motorcycling.
At the heart of the 1972 Yamaha DS7 250 sits a 247cc 2-stroke twin engine producing 30 horsepower at 7500 rpm. The twin-cylinder powerplant features a twin-cylinder layout with air-cooled cooling, fed by 2x Mikuni carburetors. Power reaches the rear wheel through a 5-speed transmission and chain final drive.
The chassis employs a steel double cradle frame with telescopic fork up front and twin shock at the rear. Stopping power comes from drum front and drum rear brakes. Tipping the scales at 135 kg (298 lbs) dry, the 1972 Yamaha DS7 250 offers a manageable riding experience with a 1310 mm wheelbase.
Performance-wise, the 1972 Yamaha DS7 250 achieves a claimed top speed of 145 km/h (90 mph). With a fuel capacity of 12.0 liters, it offers reasonable range for standard motorcycle duties. The seat height of 780 mm makes it comfortable for most riders.
At the heart of the 1972 Yamaha DS7 250 sits a 247cc 2-stroke twin engine producing 30 horsepower at 7500 rpm. The twin-cylinder powerplant features a twin-cylinder layout with air-cooled cooling, fed by 2x Mikuni carburetors. Power reaches the rear wheel through a 5-speed transmission and chain final drive.
The chassis employs a steel double cradle frame with telescopic fork up front and twin shock at the rear. Stopping power comes from drum front and drum rear brakes. Tipping the scales at 135 kg (298 lbs) dry, the 1972 Yamaha DS7 250 offers a manageable riding experience with a 1310 mm wheelbase.
Performance-wise, the 1972 Yamaha DS7 250 achieves a claimed top speed of 145 km/h (90 mph). With a fuel capacity of 12.0 liters, it offers reasonable range for standard motorcycle duties. The seat height of 780 mm makes it comfortable for most riders.
Known Issues
- Reed valve deterioration
- Exhaust power valve carbon buildup
- Crank seal wear
- Speedometer gear wear
Fun Facts
- As a two-stroke, the 1972 Yamaha DS7 250 produced a distinctive exhaust note and required premix or oil injection
- The 1972 Yamaha DS7 250 was produced in Yamaha's Japan facilities
- The 1972 Yamaha DS7 250 featured a steel double cradle frame typical of 1970s design philosophy
Collector Information
- Parts Availability
- Moderate
- Collector Rating
- 4/10
Resources & Parts
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