Yamaha SR 250 SEback 1983 forward

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Air cooled, 239cc, Single, SOHC

Power: 19.99 HP (14.7 kW) @ 7700 rpm
Final drive: Chain
Top speed: 71.46 mph
Curb weight: 297.6 lbs
Category: All-rounder
Tags: Naked
Engine and transmission
Engine type: 1 cylinders, 4-stroke, Single
Displacement: 239 cc (14.6 cubic inches)
Bore × stroke: 2.89 inch × 2.22 inch (oversquare - shortstroke)
Cooling system: Air cooled
Power: 19.99 HP (14.7 kW) @ 7700 rpm
Throttle: Cable operated
Valves
Valve train: SOHC, variable
Valves per cylinder: 4
Fuel and ignition
Sparks per cylinder: 1
Fuel supply system: Carburetor
Ignition type: TCI (Transistor Controlled Ignition)
Compression: 9.2:1
Engine mounting: Transverse
Lubrication system: Wet sump
Gear box: Manual 5-speed
Clutch: Wet, cable operated
Final drive: Chain
Spark plug pipe type: NGK, BP7ES
Motor oil: 20W/40
Starter: Electric
Dimensions
Weight
Curb weight: 297.6 lbs
Chassis and suspension
Frame type: steel, Single cradle frame
Front
Suspension: Cartridge
Brake: Drum
Tire pressure: 0.12 PSI, with pillion: 0.14 PSI withpilion
Rear
Suspension: twin shock, Swingarm
Brake: Drum
Tire: 120 / 90 R16
Tire pressure: 0.14 PSI, with pillion: 0.16 PSI withpilion
Other
ABS available: No
Power-to-weight ratio: 0.11 KW/lbs (9.18 lbs/HP)
Top speed: 71.46 mph
Fuel capacity: 2.64 gals
Number of riders: 2 persons

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