Manufactured 1978-1981, the firm was established by Antonio Cobas who built road-racing motorcycles using engines from Yamaha, Bultaco, Montesa and Rotax. Sito Pons campaigned a Siroko-Rotax in the 1981 GP season, and the working relationship between Cobas and Pons lasted many years and proved enormously fruitful. See JJ Cobas
Sources: wikipedia.ca, et al.
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