|Also called||XJ550H, XJ 550 H, XJ 550, Maxim|
|Production||1981 - 1984|
in-line four, four-stroke
|Bore / Stroke||57.0mm x 51.8mm|
|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
|Final Drive||Chain: 530x104|
|Suspension||Front: Telescopic Coil Spring Forks
Rear: Swinging Arm With Dual Dampers Adjustable For Preload
|Brakes||Front: dual disc
Rear: expanding brake
|Weight||204.0 kg (wet)|
|Oil Filter||K&N KN-144|
|Fuel Capacity||3.96 Gallon (15.00 Liters)|
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
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.
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- 2019 K&L Supply Co Catalog. K&L Supply Co. 2019.