Yamaha SR400SP (1983)

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The Yamaha SR400SP is a motorcycle produced in 1983 with a four-stroke, single-cylinder engine that has a capacity of 399cc. It has a BSR33 carburetor and CDI ignition, with a kick start. The bike has a maximum power output of 27 horsepower at 7000 rpm and a maximum torque of 27.4 Nm at 6500 rpm. It features a steel double cradle frame, 35mm telescopic front forks, and dual shocks with 5-way adjustable preload for the rear suspension. The front wheel travel is 150mm, while the rear wheel travel is 105mm. The bike also has a front single disc brake and a rear drum brake. The wheelbase is 1410mm, with a rake caster angle of 27 degrees and a trail of 111mm. The seat height is 790mm, and the ground clearance is 130mm. The bike weighs 174kg and has a fuel capacity of 12 litres.

Technical specifications:

Make Model: Yamaha SR 400SP

Year: 1983


Engine: Four stroke, single cylinder, SOHC, 2 valves per cylinder.
Capacity: 399 cc / 24.3 cu-in
Bore x Stroke: 87 67.2 mm
Compression Ratio: 8.5:1
Cooling System: Air cooled
Oil Capacity: 2.4 Litres
Lubrication: Dry sump
Induction: BSR33 carburetor
Ignition: CDI
Starting: Kick
Max Power: 27 hp / 17.1 KW @ 7000 rpm
Max Torque: 27.4 Nm / 6.3 kgf-m @ 6500 rpm
Clutch: Wet, Multiple Disc
Transmission: 5 Speed
Final Drive: Chain

Frame: Steel Double Cradle
Front Suspension: 35mm Telescopic fork
Front Wheel Travel: 150 mm / 5.9 in
Rear Suspension: Dual shocks, 5-way adjustable preload
Front Wheel Travel: 105 mm / 4.1 in
Front Brakes: Single disc
Rear Brakes: Drum
Front Tyre: 3.50-19
Rear Tyre: 4.00-16
Rake Caster Angle: 27 o
Trail: 111 mm / 4.4 in
Wheelbase: 1410 mm / 55.5 IN
Seat Height: 790 mm / 30.9 in
Ground Clearance: 130 mm / 5.1 in
Wet Weight: 174 kg / 384 lbs
Fuel Capacity: 12 Litres / 3.2 gal

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