
The 62-year-old Italian contested the Hailwood Trophy for 250cc and 350cc two-stroke grand prix and Formula 750 motorcycles that raced up to 1983. He qualified the Michael Russell-entered Yamaha TZ250 20th in the 34-bike field, 9.7 seconds off pole.
The Le Mans winner of 2000-02 and 2006-07, who recently left his role managing the McLaren young driver programme, ran 20th in race one on Saturday prior to a red flag when Alan Cathcart fell. Pirro lost places after the restart, but moved forward as his pace improved.
He crossed the line 18th overall, 10th in class.