FIOR 500-4 - Specification

Engine: Liquid-cooled crankcase reed-valve in-line four-cylinder two-stroke Dimensions: 56 x 50.6 mm Capacity: 499 cc Output: 150bhp at 12,200rpm (at gearbox) Compression ratio: 7.5:1 Carburation: 4 x 38mm Dell’orto guillotine carburettors Cylinders: Hummel cylinders with seven transfer/ three exhaust ports and electronic powervalves Ignition: Hitachi CDI Gearbox: six-speed Yamaha Clutch: Yamaha multiplate dry Chassis: None: engine employed as fully-stressed member Suspension: Front: Fabricated aluminium wishbone fork with twin superimposed triangles and fully-adjustable Koni monoshock modified by Fior. Rear: Fabricated aluminium swingarm with rising-rate suspension link and fully-adjustable Kayaba monoshock modified by Fior Head angle: 26 degrees Trail: 85 mm Wheelbase: 1360 mm Weight/distribution: 127 kg with water/oil, no fuel, split 52/48-per-cent Brakes: Front: 2 x 320mm Brembo discs with four-piston Brembo calipers. Rear: 1 x 220mm Brembo disc with two-piston JPX caliper Tyres/wheels: Front: 3.20/4.60 x 17 Dunlop radial on 3.50 inch Marvic cast aluminium wheel. Rear: 3.75/7.25 x 18 Dunlop radial on 5.50 inch Marvic cast aluminium wheel Top speed: 300 km/h Year of construction: 1988 Owner: Fior Compétition. Nogaro. Gers, France.