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Yamaha XS400S 1982 Parts & Accessories

Produced from 1977 through 1982, the Yamaha XS400 was a versatile, lightweight commuter motorcycle designed as a modern four-stroke alternative to Yamaha's two-stroke twins. Powered by an air-cooled 392 cc parallel-twin engine, it incorporated overhead camshaft design, counter-balancers for smooth operation, and a choice of electric or kick-starting. Offered in multiple variants—ranging from cast-wheel models with front disc brakes to wire-spoke budget editions—it evolved in 1982 with DOHC 4-valve cylinder heads and a Monocross rear shock suspension system before ultimately giving way to the XJ middleweight lineup.

• 392 cc air-cooled SOHC 2-valve per cylinder parallel-twin engine (DOHC 4-valve on 1982+ Seca/Maxim variants)
• Twin Mikuni BS34 constant-velocity carburetors
• Tubular steel double-cradle frame chassis
• 33 mm conventional telescopic front hydraulic forks
• Dual rear shock absorbers with 5-way adjustable spring preload (Monocross monoshock on 1982+ models)
• Single 267 mm front hydraulic disc brake and single rear expanding mechanical drum brake
• 6-speed manual transmission with wet multi-plate clutch and chain final drive
• 14-litre (3.7 US gal) fuel tank capacity