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 Cagiva - 500 C 591 Grand Prix
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Capacity : 500
Model : C 591 Grand Prix
Production : 1991 -
Category : (R) Racing


500 C591 Grand Prix / Eddie Lawson· 1991

The sole European Grand Prix 500

Since the many victories of Agostini on the MV during the 1970s, the Japanese have dominated the top category in Grand Prix racing. And, for over a decade, the Cagiva team has been the only major factory to attempt to defend the European colors in the 500cc class.

Lawson-A Trump Card

By signing four-times world champion Eddie Lawson for 1991, the Castiglione brothers pulled off a major coup. The riding and machine preparation skills of the American ace, allowed Cagiva to make its mark. The season started promisingly, with the Cagiva 500 winning in Italy, in front of those superbuffs, the "tifosi," and in France. But problems of road-holding and front-end adhesion prevented Cagiva from building on these encouraging exploits.

Advanced Technology

Technically, the Cagiva could learn nothing from the Japanese. The mechanical layout is the same as everyone else's: a two-stroke V4 with liquid cooling mounted in a box-girder aluminum frame; the brake disks are now in carbon fiber. Electronics are increasingly important, controlling the ignition, the valveson the exhaust system and even the jets in the carburetors (of Japanese origin!). By retaining the same riders for 1992, the Cagiva team can build on its experience and still offer the European industry the chance to distinguish itself at the very highest level.


Engine: 498cc (56x50.6mm) water-cooled V4; programmable electronic ignition

Power Rating: 160 hp @ 12,000 rpm

Valves: two-stroke/automatic inlet valve in crankcase

Fuel System: two 35mm Mikuni twin-choke carburetors with electronic jet control

Transmission: 6-speed

Suspension: Ohlins upside-down telescopic fork (front); boxed aluminum swinging arm, mono damper (rear)

Brakes: Twin 11 inch carbon disks (front); 7.5 inch steel disk (rear)

Wheels: 17 inch magnesium (front & rear)

Maximum Speed: 193 mph


With major victories in 1991, the 500 Cagiva has maintained the European presence in Grand Prix -racing at the very highest level.

Le fichier Moto Passion réalisé par François-Marie Dumas réunit près de deux mille photos accompagnées d'un historique très complet des machines présentées.
Il sera progressivement mis à jour ici et toute information complémentaire est la bienvenue sur info@moto-collection.org.

Cette documentation unique, qui constitue sans doute l'encyclopédie la plus exhaustive jamais écrite sur l'histoire de la moto, a été réalisée avec l'assistance de nombreux spécialistes dont principalement Didier Ganneau, Christophe Gaime, Mick Woollett, Jean Goyard, Bernard Salvat, Christian Rey, Yves Campion, Helmut Krackowizer, Michael Dregni, Michel Montange, etc. que je remercie ici.

Disponible sur demande :
- Les fiches originales sur papier
- Les photos et archives signées de mon nom en haute définition ou les documents originaux.
Me contacter sur info@moto-collection.org pour les conditions et droits d'utilisation.