b"\n_START_ARTICLE_\nGran Premi d'Espanya de motociclisme de 1964\n_START_SECTION_\n250 cc\n_START_PARAGRAPH_\n24 pilots inscrits.\n_START_SECTION_\n125 cc\n_START_PARAGRAPH_\n24 pilots inscrits.\n_START_SECTION_\n50 cc\n_START_PARAGRAPH_\n16 pilots inscrits.\n_START_SECTION_\nSidecar\n_START_PARAGRAPH_\n14 equips inscrits."