Mbike - Catalogue. Community. Map.
Catalogue. Community. Map.
Yamaha SR 250 SE 
1981 
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 |
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Dimensions
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|
| Weight | |
| Curb weight: | 297.6 lbs |
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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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