Yamaha SR400SP (1988-92)

The Yamaha SR400SP was a motorcycle produced from 1988 to 1992. It had a four-stroke, single cylinder, SOHC engine with a capacity of 399 cc and 2 valves per cylinder. The compression ratio was 8.5:1 and the cooling system was air cooled. It had a BSR33 carburetor and CDI ignition, and was kick-started. The maximum power was 27 hp at 7000 rpm, and the maximum torque was 27.4 Nm at 6500 rpm. It had a wet, multiple disc clutch and a 5-speed transmission, propelled by a chain. The frame was made of steel double cradle, with a telescopic fork front suspension and dual shocks rear suspension. The front wheel travel was 150 mm and rear wheel travel was 111 mm. The front brake was a single disc while the rear brake was a drum type. The front tyre had dimensions 3.50-19 and the rear tyre had dimensions 4.00-16. The rake caster angle was 27 degrees and the trail was 111 mm. The wheelbase was 1410 mm and the seat height was 790 mm. It had ground clearance of 130 mm and a wet weight of 174 kg. The fuel capacity was 12 litres.

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Technical specifications:

Make Model: Yamaha SR 400

Year: 1988 – 92

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: Telescopic fork

Front Wheel Travel: 150 mm / 5.9 in

Rear Suspension: Dual shocks

Front Wheel Travel: 111 mm / 4.3 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