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.

Engine[edit | edit source]

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).

Drive[edit | edit source]

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

Chassis[edit | edit source]

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[edit | edit source]

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.

1983[edit | edit source]

In Media[edit | edit source]

References[edit | edit source]

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