Yamaha xj400 (1982-83)

The Yamaha XJ 400 Seca was a motorcycle produced from 1982-83. It featured a four stroke, transverse four cylinder engine and had a capacity of 398cc. The bike was air cooled with a compression ratio of 9.7:1 and used a battery powered inductive ignition system. The engine was capable of producing 45 hp/32.8 kW at 10000 rpm and a maximum torque of 3.5 kgf-m/25.5 [email protected] 8000 rpm. It had a 6-speed transmission with a final drive chain. The front suspension featured 35mm telescopic forks and had a front wheel travel of 142mm/5.6in. The rear suspension was a single shock system with adjustable spring preload and had a rear wheel travel of 96mm/3.8in. The bike had a single disc 1 piston caliper front brake and a drum rear brake. The front tyre was 3.00-19 while the rear tyre was 110 90-18. It had a dry weight of 176kg/388lbs and a fuel capacity of 15 Litres/3.9 US gal. It was capable of reaching a top speed of 162.5 km/h/101 mph and could complete the standing 1/4 mile in 14.0 seconds, reaching a speed of 90.5 mph.

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Technical specifications:

Make Model: Yamaha XJ 400 Seca

Year: 1982 – 83

Engine: Four stroke, transverse four cylinder. DOHC

Capacity: 398 cc / 24.2 cu-in

Bore x Stroke: 51 48.8 mm

Cooling System: Air cooled

Compression Ratio: 9.7:1

Induction: 2x 34mm Mikuni carburetor

Ignition: Battery powered inductive

Starting: Electric

Max Power: 45 hp / 32.8 kW @ 10000 rpm

Max Torque: 3.5 kgf-m / 25 [email protected] 8000 rpm

Transmission: 6 Speed

Final Drive: Chain

Front Suspension: 35mm Telescopic forks

Front Wheel Travel: 142 mm / 5.6 in

Rear Suspension: Single shock, adjustable spring preload

Rear Wheel Travel: 96 mm / 3.8 in

Front Brakes: Single disc 1 piston caliper

Rear Brakes: Drum

Front Tyre: 3.00-19

Rear Tyre: 110 90-18

Dry Weight: 176 kg / 388 lbs

Fuel Capacity: 15 Litres / 3.9 US gal

Standing 1/4 Mile: 14.0 sec / 90.5 mph

Top Speed: 162.5 km/h / 101 mph