The Yamaha YZ490 motorcycle specifications include a 490 cc (29.90 cu in) engine, power of 55 hp (40.1 kW) @ 7,000 rpm, a 5-speed gearbox, and a listed weight of 107 kg (236 lb).
Key specifications
1987Year released
490 ccDisplacement
55 hpPower
107 kgDry weight
How the Yamaha YZ490 compares
This compares the motorcycle with all Yamaha models in this specifications database. The blue marker is this model and the grey line is the Yamaha database average.
Engine power55 hp
Low 2.8 hpAverage 53.3 hpHigh 171.2 hp
Very close to the Yamaha database average. Around the 63rd percentile across Yamaha models.
Displacement490 cc
Low 49 ccAverage 550 ccHigh 1,852 cc
About 11% lower than the Yamaha database average. Around the 51st percentile across Yamaha models.
This model Yamaha database average
Yamaha database percentile rankings
Percentiles show where this motorcycle sits across the Yamaha specifications database. They are descriptive database rankings, not performance ratings.
Engine power63rd
55 hp — more powerful than about 63% of Yamaha models with power data.
Displacement51st
490 cc — larger displacement than about 51% of Yamaha models.
Mechanical overview
Engine layout snapshot
Single cylinder, two-stroke • 490 cc • Air cooled • 55 hp
Chassis snapshot
5-speed • Chain (final drive)
Additional useful specifications
| Power-to-weight ratio |
0.514 hp/kg |
| Power-to-weight |
514.0 hp/tonne |
| Specific power |
112.2 hp/L |
Model information
| Year released |
1987 |
| Category |
Cross / motocross |
Engine specifications
| Engine type |
Single cylinder, two-stroke |
| Displacement |
490 cc (29.90 cu in) |
| Power |
55 hp (40.1 kW) @ 7,000 rpm |
| Cooling system |
Air |
| Fuel system |
Carburettor |
Transmission and drivetrain
| Gearbox |
5-speed |
| Final drive |
Chain (final drive) |
| Clutch |
wet plate |
Brakes, wheels and tires
| Front brakes |
Single disc |
| Rear brakes |
Expanding brake (drum brake) |
Dimensions and weight
| Dry weight |
107 kg (236 lb) |
Performance
| Power/weight ratio |
0.5138 hp/kg |
Other specifications
| Color options |
red seat, white tank and plastics |
| Price as new |
US$ 3000. MSRP depends on country, taxes, accessories, etc. |
Disclaimer: Specifications may vary by market, trim, production date and optional equipment, and scraped or historical data can contain errors. Comparison and percentile values are calculated from Yamaha models in this specifications database. Always double-check important specifications against the motorcycle owner’s/service manual and official Yamaha information before relying on them. Visit the official Yamaha website.