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Yamaha Specifications

Yamaha XS 400R (1982)

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Yamaha XS 400R (1982)

At a glance

Capacity
399 cc / 24.3 cu-in
Power
45.5 hp / 34 kW @ 9500 rpm
Torque
3.5 kgf-m / 25.3 lb-ft @ 8000 rpm
Seat height
30.9 in

The full picture.

The Yamaha XS 400R (1982) is a four-stroke, parallel-twin, DOHC motorcycle with a capacity of 399 cc. It has a maximum power of 45.5 hp at 9500 RPM and maximum torque of 3.5 kgf-m at 8000 RPM. The engine features 2 valves per cylinder and a compression ratio of 9.7:1. It has air cooling and uses wet sump lubrication with 2x 32mm Mikuni carburetors for induction. The ignition is transistorized and the starting is electric. The transmission has six speeds, and the final drive is a chain. The frame is made of pressed steel with the engine as a stressed member. The front suspension is hydraulic telescopic forks with a front wheel travel of 138 mm, while the rear suspension features the monocross system with pre-load adjustable single coil sprung, gas/oil damped shock, and a rear wheel travel of 96.5 mm. The front brake is a single 10.5-inch disc, and the rear brake is a drum. It has a wheelbase of 54.1 inches, a seat height of 30.9 inches, and a ground clearance of 5.9 inches. The dry weight is 366 lbs, and the fuel capacity is 17 litres or 4.4 US gallons.


Technical specifications:

Make Model: Yamaha XS 400 DOHC

Motorcycle technical specifications
Year1982 –
EngineFour stroke, parallel twin, DOHC, 2 valves per cylinder
Capacity399 cc / 24.3 cu-in
Bore x Stroke69.0 x 53.4 mm
Cooling SystemAir cooled
Compression Ratio9.7:1
LubricationWet sump
Induction2x 32mm Mikuni carburetors
IgnitionTransistorized
StartingElectric
Max Power45.5 hp / 34 kW @ 9500 rpm
Max Torque3.5 kgf-m / 25.3 lb-ft @ 8000 rpm
ClutchWet, multiplate
Transmission6 Speed
Final DriveChain
FramePressed steel spine with engine as stressed member
Front SuspensionHydraulic telescopic forks
Front Wheel Travel138 mm / 5.5 in
Rear SuspensionMonocross system with single coil sprung, gas/oil damped shock, pre-load adjustable
Rear Wheel Travel96.5 mm / 3.8 in
Front BrakesSingle 10.5 in disc
Rear BrakesDrum
Front Tyre3.00-18
Rear Tyre4.10-18
Rake63 degrees
Trail95 mm / 3.74 in
Wheelbase54.1 in
Seat Height30.9 in
Ground Clearance5.9 in
Dry Weightkg / 366 lbs
Fuel Capacity17 Litres / 4.4 US gal