Yamaha XJ550

'**Yamaha XJ550'**
	'Yamaha XJ550'
Manufacturer	[[Yamaha]]
Also called	XJ550H, XJ 550 H, XJ 550, Maxim
Production	1981 - 1984
Class	[[:Category:Naked motorcycles\|Naked]] [[Category:Naked motorcycles]]
Engine	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
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

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

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

Chassis

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.

1983

1983 Yamaha Maxim XJ550 in Maroon
1983 Yamaha Maxim XJ550 in Maroon

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