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Yamaha XS 400

Make Model	Yamaha XS 400
Year	1979 -
Engine	Four stroke, 180° parallel twin, SOHC, 2 valves per cylinder
Capacity	392 cc / 23.9 cu-in
Bore x Stroke	69.0 x 52.4 mm
Cooling System	Air cooled
Compression Ratio	9.2:1
Lubrication	Pressure-lubricated wet sump
Induction	2x Mikuni BS32 carburetors
Ignition	Battery ignition - With contact breaker points
Starting	Electric & kick
Max Power	36 hp / 26.8 kW @ 8100 rpm
Max Torque	3.3 kgf-m / 23.8 lb-ft @ 8000 rpm
Clutch	Wet multiplate
Transmission	6 Speed
Final Drive	Chain
Frame	Tubular steel, semi-double cradle
Front Suspension	Telescopic fork
Rear Suspension	Dual shocks swing arm, preload adjustable
Front Brakes	Single disc
Rear Brakes	Single disc
Front Tyre	3.00-18
Rear Tyre	3.50-18
Wheelbase	1364 mm / 53.7 in
Seat Height	780 mm / 30.7 in
Wet Weight	182 kg / 401 lbs
Fuel Capacity	14 Litres / 3.7 US gal