What category is the 1984 Yamaha XJ 650 (reduced Effect)?

The 1984 Yamaha XJ 650 (reduced Effect) has a Category of Classic.

What is the engine size of the 1984 Yamaha XJ 650 (reduced Effect)?

The 1984 Yamaha XJ 650 (reduced Effect) has a Capacity: of 653.00 ccm (39.85 cubic inches).

What type of engine does the 1984 Yamaha XJ 650 (reduced Effect) have?

The 1984 Yamaha XJ 650 (reduced Effect) has a Engine type of In-line four.

What is the engine power of the 1984 Yamaha XJ 650 (reduced Effect)?

The 1984 Yamaha XJ 650 (reduced Effect) has a Power of 50.00.

Is the 1984 Yamaha XJ 650 (reduced Effect) air cooled or liquid cooled?

The 1984 Yamaha XJ 650 (reduced Effect) has a Cooling system of Air.

How many gears does the 1984 Yamaha XJ 650 (reduced Effect) have?

The 1984 Yamaha XJ 650 (reduced Effect) has a Gearbox of 5-speed.

How much does the 1984 Yamaha XJ 650 (reduced Effect) weigh?

The 1984 Yamaha XJ 650 (reduced Effect) has a Weight incl. oil, gas, etc of 231.0 kg (509.3 pounds).

What is the top speed of the 1984 Yamaha XJ 650 (reduced Effect)?

The 1984 Yamaha XJ 650 (reduced Effect) has a Top speed of 173.0 km/h (107.5 mph).

Yamaha XJ 650 (reduced Effect) - 1984 Specifications and Reviews

Name: 1984 Yamaha XJ 650 (reduced Effect)
Brand: Yamaha

The 1984 Yamaha XJ 650 is an accessible middleweight sport-tourer that suits novice and experienced riders alike. Known for its reliable air-cooled four-cylinder engine and smooth shaft-drive transmission, it delivers predictable handling and everyday practicality. This Japanese classic remains popular for commuting and casual weekend rides.

⇄ Compare against another bike 📅 All Years

1984

1983

1982

Yamaha XJ 650 (reduced Effect) 1984 19780

❮❯

Yamaha XJ 650 (reduced Effect) 1984 19780 Thumb

Add/Upload pictures for this motorcycle

General information
Category	Classic
Year	1984
Model	Yamaha XJ 650 (reduced effect)

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	8.5:1
Power	50.00
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 (reduced Effect) 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	173.0 km/h (107.5 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

50 hp

Peak Power

6.5s

0-60 mph

107.5 mph

Top Speed

Best For

Track25%

City55%

Cornering50%

Daily Riding60%

Touring55%

Passenger55%

Rider Profile

Best For	This is a detuned, learner-friendly version of the XJ650 and suits newer riders or those returning to biking after a break.
Purpose	Best suited to relaxed commuting and gentle weekend rides rather than outright performance.
Rider Fit	A moderate curb weight and shaft drive make it manageable for riders of average strength and experience, with no extreme reach or seat height demands expected.
Character	A classic air-cooled inline-four with smooth, modest power delivery and shaft-drive reliability, offering understated, dependable charm rather than excitement.
Not Ideal For	Not the right choice for riders seeking sharp acceleration, sporty cornering ability, or any off-road capability.

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