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Suzuki GSX-R400F 1986 Parts & Accessories

First introduced in 1984 as the pioneer of Suzuki's race-replica revolution, the Suzuki GSX-R400 was the first model to bear the iconic GSX-R badge—predating the legendary GSX-R750. Engineered to dominate Japan's ultra-competitive 400 cc sports bike class, the model evolved across several major technical generations during its 12-year production run (1984–1996). Early models (GK71B/GK71F) utilized lightweight aluminum double-cradle frames and liquid- or liquid/oil/air-assisted cooling (SATCS), before shifting to rigid aluminum twin-spar frames, "Slingshot" carburetors, and upswept 4-into-2 exhausts in the late 1980s. The ultimate iteration—the 1990–1996 GSX-R400R (GK76A)—introduced upside-down (USD) front forks, an aluminum double-cradle beam frame, and refined aerodynamics, establishing itself alongside the Honda CBR400RR and Kawasaki ZXR400 as a peak expression of JDM 400 cc racing engineering.

• 398 cc liquid-cooled DOHC 16-valve 4-stroke inline-4 engine (Bore x Stroke: 53.0 mm x 45.2 mm early; 56.0 mm x 40.4 mm 1988+)
• Power & Torque: 59 HP @ 11,000 RPM (1984–1989), 60 HP @ 12,500 RPM / 38.4 Nm torque @ 10,000 RPM (1990–1992), restricted to 53 HP (1993–1996 JDM regulatory limit)
• Induction System: Four Mikuni carburetors (BDST32/BST30 "Slingshot") fed by high-volume airbox
• Chassis Architecture: Lightweight tubular/extruded aluminum double-cradle frame (GK71B/GK76A) or aluminum twin-spar box-section frame (GK73A)
• Front Suspension: Conventional 41 mm telescopic front forks (1984–1989) or inverted (USD) telescopic coil-spring cartridge forks (1990+ GK76A) with adjustable preload and rebound damping
• Rear Suspension: Link-type single shock absorber (Full-Floater system) with gas-charged reservoir, fully adjustable for spring preload and rebound damping
• Braking System: Dual 290 mm to 300 mm front hydraulic disc brakes with 4-piston Tokico calipers and single 220 mm to 240 mm rear hydraulic disc brake
• Transmission & Drivetrain: 6-speed constant-mesh manual transmission with cable-actuated wet multi-plate clutch and chain final drive
• Wheels & Tires: 100/90-16 front and 120/80-18 rear (early) evolving to 120/60-VR17 front and 160/60-VR17 rear radial tires on 3-spoke cast aluminum alloy wheels
• Dimensions & Mass: 760 mm to 775 mm (29.9–30.5 in) seat height; dry weight ranging from 152 kg (335 lbs) (1984 original) to 167 kg (368 lbs) (1990+ GK76A) with a 16.0-litre (4.2 US gal) fuel tank capacity