Yamaha xs400SP (1980-81)

The Yamaha XS 400 Special is a motorcycle model from the year 1980-81. It has a four-stroke, air-cooled, 180-degree parallel twin engine with a capacity of 392cc. The engine has a bore x stroke of 69.0 x 52.4 mm and a compression ratio of 9.2:1. The lubrication system is a pressure-lubricated wet sump, and it has the Mikuni BS32 carburetor induction system. It has battery ignition with contact breaker points and can be started using both an electric and kick start system.

The motorcycle has a maximum power output of 36hp / 26.8 kW at 8100rpm and a maximum torque of 3.3 kgf-m / 23.8 lb-ft at 8000 rpm. The clutch is a wet multiplate type and has a six-speed transmission system. The final drive is a chain drive, and the frame is of tubular steel, semi-double cradle type.

The front suspension is a telescopic fork, and the rear suspension is a dual shock swing arm that is preload adjustable. The front brake system consists of a single disc setup, and the rear brake is a drum type. The front and rear tires have a size of 3.00-18 and 3.50-18, respectively.

The Yamaha XS 400 Special has a wheelbase of 1364 mm / 53.7 in, a seat height of 780 mm / 30.7 in, and a wet weight of 182 kg / 401 lbs. The motorcycle has a fuel capacity of 14 liters / 3.7 US Gal.

Technical specifications:

Make Model: Yamaha XS 400 Special

Year: 1980 – 81
Engine: Four stroke, 180 degrees 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: Drum
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