For the 1983 model year, the Yamaha XJ 550 Seca motorcycle has a listed wet/running weight of 449.7 lb (204 kg).
Yamaha XJ 550 Seca weight overview
This is neither unusually light nor extremely heavy. For most riders the practical weight question is more about seat height, center of mass and low-speed balance than the scale number alone.
Middleweight Motorcycle
How heavy is the Yamaha XJ 550 Seca?
wet weight
Using a model-level wet weight comparison, the Yamaha XJ 550 Seca is heavier than about 58.7% of 69 Yamaha naked bikes with compatible weight data.
Ready-to-ride weight
Bike + rider total weight
These totals use the model’s representative wet weight. They exclude riding gear, luggage and a passenger.
Yamaha XJ 550 Seca weight & related specs
| Model years covered | 1983 |
|---|---|
| Wet / running weight | 449.7 lb (204 kg) |
| Engine displacement | 528 cc |
| Power | 50 hp |
| Torque | 30.9 lb-ft (41.9 Nm) |
| Fuel capacity | 3.96 US gal (15 L) |
| Full-tank fuel weight (estimated) | 24.6 lb (11.2 kg) |
Useful weight calculations
| Horsepower per 100 lb | 11.12 hp / 100 lb |
|---|---|
| Pounds per horsepower | 8.99 lb / hp |
| Torque per 100 lb | 6.87 lb-ft / 100 lb |
| Displacement per pound | 1.17 cc / lb |
| Weight per 100 cc | 85.2 lb / 100 cc |
| Fuel weight as % of bike weight | 5.5% |
What the weight numbers tell you
Yamaha XJ 550 Seca weight FAQ
How heavy is the Yamaha XJ 550 Seca ready to ride?
Listed ready-to-ride weight is 449.7 lb (204 kg).
Is the Yamaha XJ 550 Seca heavy compared with other Yamaha naked bikes?
It sits fairly close to the middle of the category. Its representative wet weight is around the 59th percentile among 69 compatible Yamaha naked bikes.
How much does the Yamaha XJ 550 Seca fuel weigh?
The listed tank capacity is 3.96 US gal (15 L). Using approximately 0.745 kg/L gasoline, a full tank is roughly 24.6 lb (11.2 kg). That is an estimate for fuel mass, not an official Yamaha curb-weight calculation.
How heavy is the Yamaha XJ 550 Seca with an average-size rider?
A 180 lb rider brings the simple bike-plus-rider total to roughly 629.7 lb (285.6 kg) using the representative wet/running figure. Gear and luggage would add more.
How much horsepower does the Yamaha XJ 550 Seca have per 100 lb?
Where compatible power and weight figures are available, it works out to 11.12 hp per 100 lb. That places it around the 42nd percentile within the compatible Yamaha naked bike power-to-weight comparison.
What is the Yamaha XJ 550 Seca torque per 100 lb of bike weight?
The calculated torque-to-weight range is 6.87 lb-ft per 100 lb. It is useful for comparing bikes with very different overall weights.
How many cc does the Yamaha XJ 550 Seca have per pound?
Engine displacement relative to bike weight is 1.17 cc per lb. It can help compare motorcycles from very different displacement classes without relying on cc alone.
How does the Yamaha XJ 550 Seca compare with the median Yamaha naked bike weight?
The model sits about 30.9 lb (14 kg) heavier than the compatible median Yamaha naked bike weight used on this page.
Will the Yamaha XJ 550 Seca feel heavy at low speed?
It is most likely to feel heavy while stopped, backing up or on a slope rather than once settled at normal riding speed. Seat height and center of gravity matter a lot.
Motorcycle specifications can vary by model year, market, equipment and the exact dry/curb-weight definition. Calculated fuel-weight and ratio figures on this page are estimates derived from the supplied specifications. Confirm critical figures in the owner’s manual or on the official Yamaha Motorsports website.