Red Bull KTM has announced that Julian Simon will be retained to ride alongside new signing Tomoyoshi Koyama and current Junior Team rider Randy Krummenacher for next season's 125cc World Championship.

"We are very pleased that as well as Julian Simon, Tomoyoshi Koyama signed with us during the recent grand prix in Japan and together with junior rider Randy Krummenacher, rounds up the team," said KTM road racing director Harald Bartol.

Finn Mika Kallio has led the KTM challenge in recent seasons, finishing second in both the 2005 and 2006 world championships, but his omission from the team's 2007 125cc line-up suggests he will be graduating to the 250cc class.

Meanwhile, the Red Bull KTM Junior Team will be integrated into the factory team next season, under the leadership of Harald Bartol.

"By doing this we can be sure that we will be able to have a maximum amount of success with our project," said Bartol.