Tomoyoshi KOYAMA joins KTM 2007 Red Bull KTM GP 125 is pleased to welcome 23-year old Tomoyoshi Koyama to their team. The Japanese rider on Sunday signed with KTM Sportmotorcycle AG to ride for their GP 125 team for the 2007 road racing season. The contract was concluded at the Japanese Grand Prix at the Motegi circuit, where two KTM team riders, Mika Kallio and Hiroshi Aoyama took two first places in the 125 and 250 class races.