Yamaha XJ400

Yamaha XJ400
Manufacturer	Yamaha
Also called	XJ 400
Production	1981
Class	Naked
Engine	Air Cooled, Four Stroke, Transverse Four Cylinder, DOHC
Bore / Stroke	50.8mm x 50.8mm
Compression ratio	9.7:1
Horsepower	45.06 HP (33.6 KW) @ 10000RPM
Torque	25.08 ft/lbs (34.0 Nm) @ 8000RPM
Air Filter	K&N YA-1600 `81-82
Transmission	Gear box: 6-Speed Final Drive: Chain Clutch: Wet multi-plate
Suspension	Front: Telescopic Forks Rear: Single Shock, Adjustable Spring Preload
Brakes	Front: Single Disc 1 Piston Caliper Rear: Drum
Front Tire	3.00-19
Rear Tire	110/90-18
Weight	189.0 kg (wet)
Recommended Oil	Yamalube 10w-40
Fuel Capacity	1.06 Gallon (4.00 Liters)
Manuals	Service Manual

The Yamaha XJ 400 was a Air Cooled, Four Stroke, Transverse Four Cylinder, DOHC Naked motorcycle produced by Yamaha in 1981. Max torque was 25.08 ft/lbs (34.0 Nm) @ 8000 RPM. Claimed horsepower was 45.06 HP (33.6 KW) @ 10000 RPM.

Engine

A 50.8mm bore x 50.8mm stroke result in a displacement of just 398.0 cubic centimeters.

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 Single Disc 1 Piston Caliper in the front and a Drum in the rear. The front suspension was a Telescopic Forks while the rear was equipped with a Single Shock, Adjustable Spring Preload. The XJ 400 was fitted with a 1.06 Gallon (4.00 Liters) fuel tank.

1981 - 1985 Yamaha XJ 400

The 1981 Yamaha XJ 400 model is a Naked bike bike manufactured by Yamaha. In this version sold from year 1981, the dry weight is 176.0 kg (388.0 pounds) and it is equiped with a Four cylinder boxer, four-stroke motor. The engine produces a maximum peak output power of 45.00 HP (32.8 kW) at 10000 RPM and a maximum torque of 33.90 Nm (3.5 kgf-m or 25.0 ft.lbs) at 8000 RPM.

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