What category is the 1981 Yamaha XJ 650?

The 1981 Yamaha XJ 650 has a Category of Classic.

What is the engine size of the 1981 Yamaha XJ 650?

The 1981 Yamaha XJ 650 has a Capacity: of 653.00 ccm (39.85 cubic inches).

What type of engine does the 1981 Yamaha XJ 650 have?

The 1981 Yamaha XJ 650 has a Engine type of In-line four.

What is the engine power of the 1981 Yamaha XJ 650?

The 1981 Yamaha XJ 650 has a Power of 71.00.

Is the 1981 Yamaha XJ 650 air cooled or liquid cooled?

The 1981 Yamaha XJ 650 has a Cooling system of Air.

How many gears does the 1981 Yamaha XJ 650 have?

The 1981 Yamaha XJ 650 has a Gearbox of 5-speed.

How much does the 1981 Yamaha XJ 650 weigh?

The 1981 Yamaha XJ 650 has a Weight incl. oil, gas, etc of 231.0 kg (509.3 pounds).

What is the top speed of the 1981 Yamaha XJ 650?

The 1981 Yamaha XJ 650 has a Top speed of 197.0 km/h (122.4 mph).

Yamaha XJ 650 - 1981 Specifications and Reviews

Name: 1981 Yamaha XJ 650
Brand: Yamaha
Rating: 2 (1 reviews)

The 1981 Yamaha XJ 650 is a middleweight classic that appeals to riders seeking balanced performance and reliability. Its air-cooled inline-four engine delivers smooth 71 horsepower with practical shaft drive, making it ideal for everyday commuting and long-distance touring. Known for durability and user-friendly handling, the XJ 650 remains a popular choice for both novice and experienced riders.

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1981

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General information
Category	Classic
Year	1981
Model	Yamaha XJ 650

Engine and Transmission Specifications
Transmission typefinal drive	Shaft drive (cardan)
Gearbox	5-speed
Cooling system	Air
Fuel control	DOHC
Valves per cylinder	2
Bore x stroke	63.0 x 52.4 mm (2.5 x 2.1 inches)
Compression	9.2:1
Power	71.00
Stroke	4
Engine type	In-line four
Capacity:	653.00 ccm (39.85 cubic inches)
Physical measures and capacities
Weight incl. oil, gas, etc	231.0 kg (509.3 pounds)
Yamaha XJ 650 dimensions and frame
Rear brakes	Expanding brake
Front brakes	Dual disc
Rear tyre dimensions	120/90-18
Front tyre dimensions	3.25-19

Speed and acceleration
Top speed	197.0 km/h (122.4 mph)
Other specs
Maintenance	Find parts, fluids, filters, maintenance tools and service items on eBay
Fuel capacity	20.50 litres (5.42 gallons)

Performance Profile & Rider Fit

71 hp

Peak Power

4.8s

0-60 mph

122.4 mph

Top Speed

Best For

Track35%

City58%

Cornering55%

Daily Riding65%

Touring62%

Passenger60%

Rider Profile

Best For	A confident beginner or returning rider will feel at home, as the XJ 650 is forgiving but rewards smooth, deliberate inputs.
Purpose	This bike suits riders who want a classic, versatile naked machine for commuting, weekend rides, and light touring rather than outright performance.
Rider Fit	At 231 kg with a moderate seat height typical of early-80s UJMs, it's manageable for average-height riders but noticeable at low speeds or when maneuvering by hand.
Character	The air-cooled inline-four and shaft drive give it a smooth, mechanical charm with steady, unhurried power delivery rather than aggressive thrills.
Not Ideal For	It's not the right choice for riders seeking modern sportbike agility, off-road capability, or class-leading acceleration.

Character map is an editorial estimate based on this bike's specifications, not a lab-tested measurement.