Kiuru had problems getting used to the new 'weight index' rule that was introduced for the 2003/04 season. At first, he gained weight to get permission to use longer skis, but later decided to slim back down in order to use shorter skis.
Kiuru proved that he is still in good condition by winning the Finnish Championship gold medal in the Individual Large Hill competition. He also won a silver medal in the team large hill event at the 2006 Winter Olympics in Turin.