Yamaha SR400SP (1983)

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