Yamaha DS 7back 1972

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Air cooled, 247cc, 2, 2-stroke

Power: 23.79 HP (17.5 kW) @ 7500 rpm
Final drive: Chain
Top speed: 86.99 mph
Curb weight: 321.9 lbs
Category: All-rounder
Tags: All-rounder, Classic bike
Engine and transmission
Engine type: 2 cylinders, 2-stroke
Displacement: 247 cc (15.09 cubic inches)
Bore × stroke: 2.13 inch × 2.13 inch (square)
Cooling system: Air cooled
Power: 23.79 HP (17.5 kW) @ 7500 rpm
Throttle: Cable operated
Fuel and ignition
Sparks per cylinder: 1
Fuel supply system: Carburetor
Compression: 7.1:1
Gear box: Manual 5-speed
Clutch: Wet, multiple discs, cable operated
Final drive: Chain
Dimensions
Weight
Curb weight: 321.9 lbs
Chassis and suspension
Frame type: steel, Double cradle frame
Front
Suspension: Cartridge
Brake: Drum
Rear
Suspension: twin shock, Swingarm
Brake: Drum
Other
ABS available: No
Power-to-weight ratio: 0.12 KW/lbs (8.34 lbs/HP)
Top speed: 86.99 mph
Fuel capacity: 3.17 gals
Number of riders: 2 persons

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