How can I reset horizon 2 game?

I’ve completed the championships twice and wanna do it all over but from scratch. How can I rest the game? And will I lose my past purchases? Please help

Go into your game folder and click manage, then delete your save data. You will be right back at the start of the game with no credits, no cars, and no wristbands. lol
It will not affect purchases of DLC.

http://forums.forza.net/turn10_postst59423_Restarting-FH2.aspx