The 2006 World Championship saw the young man Michele Pirro back on Aprilia, bike with which he won the European Championship in 2004. Unfortunately the season starts badly due to a serious injury to his right ankle during the pre-season tests at Jerez de la Frontera. Then Pirro struggle to find understanding with the team and the performances are well below expectations due to a lack of competitiveness of the bike. The champion from Puglia can not accept being only a guest appearance of the championship and chose, the following year (2007), to go the 4-stroke category Superstock 1000 of the Superbike circuit, thanks to the help of Davide Brivio and to go back to win with the Yamaha of Vanni Lorenzini.
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