Yamaha XJ550

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Yamaha XJ550
Also called XJ550H, XJ 550 H, XJ 550, Maxim
Production 1981 - 1984
Class Naked
in-line four, four-stroke
Bore / Stroke 57.0mm x 51.8mm
Compression ratio 9.5:1
Top Speed 109 mph (176 km/h)
Horsepower 48.95 HP (36.5 KW) @ 9000RPM
Torque 30.98 ft/lbs (42.0 Nm) @ 7500RPM
Spark Plug NGK D8EA '81-83
Battery YUASA 12N12A-4A-1 '81-83
Transmission Gear box: 6-speed

Final Drive: chain

Clutch: Wet multi-plate
Final Drive Chain: 530x104
Front Sprocket 16T
Rear Sprocket 45T
Suspension Front: Telescopic Coil Spring Forks
Rear: Swinging Arm With Dual Dampers Adjustable For Preload
Brakes Front: dual disc
Rear: expanding brake
Front Tire 3.00-19
Rear Tire 110/90-18
Weight 204.0 kg (wet)
Oil Filter K&N KN-144[1]
Recommended Oil Yamalube 10w-40
Fuel Capacity 3.96 Gallon (15.00 Liters)
Manuals Service Manual

The Yamaha XJ550 was a in-line four, four-stroke Naked motorcycle produced by Yamaha between 1981 and 1984. It could reach a top speed of 109 mph (176 km/h). Max torque was 30.98 ft/lbs (42.0 Nm) @ 7500 RPM. Claimed horsepower was 48.95 HP (36.5 KW) @ 9000 RPM.


The engine was a air cooled in-line four, four-stroke. A 57.0mm bore x 51.8mm stroke result in a displacement of just 528.0 cubic centimeters. Fuel was supplied via a double overhead cams/twin cam (dohc).


The bike has a 6-speed transmission. Power was moderated via the Wet multi-plate.


It came with a 3.00-19 front tire and a 110/90-18 rear tire. Stopping was achieved via dual disc in the front and a expanding brake in the rear. The front suspension was a Telescopic Coil Spring Forks while the rear was equipped with a Swinging Arm With Dual Dampers Adjustable For Preload. The XJ550 was fitted with a 3.96 Gallon (15.00 Liters) fuel tank.

1981 - 1983 Yamaha XJ 550

1981 - 1983 Yamaha XJ 550 1981 - 1983 Yamaha XJ 550

The XJ 550 was launched in 1981. The Yamaha XJ 550 Seca was also well-equipped, with features you’d expect only on bigger, costlier bikes: self-canceling turn signals; a clutch/neutral electrical interlock that prevented the Seca being ridden away with the sidestand down by killing the engine if you shifted into first before lifting the stand.


In Media


  1. 2019 K&L Supply Co Catalog. K&L Supply Co. 2019.