Naked Motorcycles
1981Yamaha SR 500 G (Cast Wheels)
19 fields on record
The 1981 Yamaha SR 500 G combines classic styling with modern reliability, appealing to riders seeking a lightweight, manageable motorcycle. Its single-cylinder engine delivers straightforward performance with minimal complexity, while cast wheels and air cooling keep maintenance simple. Best known for accessible everyday riding and beginner-friendly handling, it remains a popular entry point to motorcycling.
- Capacity
- 499.0 ccm
- Engine
- Single, four-stroke
- Gearbox
- 5-speed
- Wet weight
- 174.0 kg
- Seat height
- Not on record
Know it? Add it → - Power
- 27.0 HP (19.9 kW) @ 6000 RPM
How it rides
Editorial estimate from the spec sheet - not lab tested- Best for
- A lightweight single-cylinder retro roadster built for pure, unfiltered riding feel rather than outright speed or long-distance comfort.
- Built for
- An honest, characterful single that rewards smooth riding with charm, mechanical simplicity, and a raw connection to the road.
- Not ideal for
- Not for riders seeking high speed, modern electronics, off-road capability, or a plush, passenger-friendly touring experience.
Scores are derived from the spec sheet using the same model across every bike, so they compare like for like.
Engine
- Capacity
- 499.0 ccm
- Power
- 27.0 HP (19.9 kW) @ 6000 RPM
- Engine type
- Single, four-stroke
- Power/weight ratio
- 0.1552 HP/kg (wet)
- Bore x stroke
- 87.0 x 84.0 mm
- Compression
- 9.0:1
- Cooling system
- Air
- Valves per cylinder
- 2
- Torque
- Not on record - add it
Transmission
- Gearbox
- 5-speed
- Transmission type
- Manual
- Final drive
- Chain
Performance
- Top speed
- 135.0 km/h (83.9 mph)
Dimensions & weight
Brakes & wheels
- Front brakes
- Single disc
- Rear brakes
- Expanding brake
- Front tyre
- 3.50-19
- Rear tyre
- 4.00-18
Compiled from manufacturer documentation and user contributions, corrected on an ongoing basis. Spotted something wrong? Tell us.
What changed, year to year
Differences highlighted| Specification | 1980 | 1981 |
|---|---|---|
| Capacity | 499 cc | 499 cc |
| Fuel capacity | 12 L | 12 L |
Illustrative - generated automatically by diffing the year records already on file, not a manufacturer-published changelog.
Rider Reviews
Common questions
What is the engine size of the Yamaha SR 500 G (Cast Wheels)?
The 1981 Yamaha SR 500 G (Cast Wheels) has a Capacity of 499.0 ccm (30.45 cubic inches).
What engine power does the Yamaha SR 500 G (Cast Wheels) have?
The 1981 Yamaha SR 500 G (Cast Wheels) has a Power of 27.0 HP (19.9 kW) @ 6000 RPM.
How many gears does the Yamaha SR 500 G (Cast Wheels) have?
The 1981 Yamaha SR 500 G (Cast Wheels) has a Gearbox of 5-speed.
How much does the Yamaha SR 500 G (Cast Wheels) weigh?
The 1981 Yamaha SR 500 G (Cast Wheels) has a Wet weight of 174.0 kg (383.6 pounds).
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