Hiroshi Aoyama
For the 2007 season, Kallio moved up to KTM's squad in the 250cc category alongside Japan's Hiroshi Aoyama. After a difficult start to the season with mechanical woes at Qatar and Spain, Kallio would consistently be fighting around the top six positions. The turning point of the season would be at Germany, where Kallio took his debut pole position and podium finish in the class for come home in 2nd behind teammate Aoyama to cap a fine 1–2 for KTM. A third place followed at the Czech Republic, although a nasty highside at San Marino, and more mechanical problems at Portugal were to slow his progress.