The Yamaha SR400 is a motorcycle produced between 1981 and 1982. It is powered by a four-stroke, single-cylinder engine with a displacement of 399 cc, featuring SOHC and two valves per cylinder. The motorcycle has a compression ratio of 8.5:1 and a BSR33 carburetor. The ignition is CDI and it has a kick starting mechanism. The maximum power output is 27 horsepower at 7000 RPM and a maximum torque of 27.4 Newton-meters at 6500 RPM. The clutch is wet, multiple disc and the transmission is a 5 speed gearbox, which is chain driven. The motorcycle has a steel double cradle frame and a front suspension with a 35mm telescopic fork.
The front wheel travel is 150 mm while the rear suspension is designed with dual shocks and adjustable preload, with a travel of 105 mm. The front brake is a single disc while the rear brake is a drum. The front and rear tires have a size of 3.50-19 inches and 4.00-16 inches, respectively. The motorcycle has a unique 27 degree rake caster angle, which provides a sporty style and a trail of 111 mm.
With a wet weight of 174 kg, it has a fuel capacity of 12 litres. The motorcycle is equipped with a dry sump lubrication system and an air cooling system. With a seat height of 790 mm and a ground clearance of 130 mm, this motorcycle represents classic Japanese style and vintage design.
Make Model: Yamaha SR 400
Year: 1981 – 82
Engine: Four stroke, single cylinder, SOHC, 2 valves per cylinder.
Capacity: 399 cc / 24.3 cu-in
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