Yamaha · Model— SR250
SR250
1 generation1980 - 1980Naked
About generation 4K1
1980
- Years
- 1980+
- Frame codes
- 4K1
- Class
- Naked
Specifications
10 groupsGeneral
3- Market
- Japanese domestic (JDM)
- Model code
- 4K1
- Manufacturer
- YAMAHA
Engine
19- Bore
- 75 mm
- Cooling
- Air-cooled
- Power
- 21 hp
- Fuel type
- Regular (low-octane)
- Power RPM
- 8,000 rpm
- Stroke
- 56.5 mm
- Cylinders
- 1
- Torque RPM
- 6,500 rpm
- Engine code
- 4J1
- Fuel system
- Carburetor
- Engine type
- 4-stroke
- Torque (kgf·m)
- 2.05 kgf·m
- Valvetrain
- SOHC
- Lubrication
- Wet sump
- Cylinder layout
- Single cylinder
- Displacement
- 249 cc
- Fuel system model
- BS34
- Compression ratio
- 9.2
- Valves per cylinder
- 2
Transmission
10- Type
- Return shift
- Gears
- 5
- Clutch
- Wet multi-plate
- Chain size
- 520
- Shift type
- Foot shift
- Chain links
- 102
- Final drive
- Chain
- Gear ratios
- 2.642 / 1.684 / 1.26 / 1 / 0.821
- Primary reduction
- 3.13
- Secondary reduction
- 2.75
Chassis
18- Frame
- Diamond
- Rear tire
- 120/90-16
- Front tire
- 3.00-19
- Rear brake
- Drum (leading-trailing)
- Front brake
- Drum (leading-trailing)
- Rear rim width
- 2.15
- Rear tire type
- Tube type
- Front fork type
- Conventional
- Front rim width
- 1.6
- Front tire type
- Tube type
- Rear shocks
- 2
- Rear suspension
- Swingarm
- Front suspension
- Telescopic fork
- Rear load index
- 63
- Front ply rating
- 4PR
- Rear speed rating
- S
- Rear tire construction
- Bias
- Front tire construction
- Bias
Dimensions
9- Trail
- 132 mm
- Width
- 815 mm
- Height
- 1,135 mm
- Length
- 2,020 mm
- Rake
- 30.33 °
- Wheelbase
- 1,340 mm
- Seat height
- 740 mm
- Ground clearance
- 150 mm
- Turning radius
- 2.3 m
Weight
2- Dry weight
- 124 kg
- Seats
- 2
Capacities
2- Fuel tank
- 10 l
- Engine oil (total)
- 1.6 l
Electrical
7- Starter
- Electric starter
- Ignition
- Transistorized (TCI)
- Spark plug
- BP7ES
- Spark plugs
- 1
- Battery capacity
- 12V-12Ah
- Taillight rating
- 27W/8W
- Headlight rating (high)
- 50W/40W
Instruments
2- Tachometer
- Yes
- Speedometer
- Analog
Performance
5- Range
- 570 km
- Rear tire pressure
- 2.25 kgf/cm²
- Front tire pressure
- 2 kgf/cm²
- Measure standard
- At 50 km/h
- Fuel economy
- 1.8 L/100km