MotoGP 06 USA Extreme Bike: Press Right, Up, B, B, A, B, Up, B, B, A at the "Game Mode" screen. 50th Anniversary bike (yellow/white with black bar stripe): Set your season to 2005 and win a quick race with Valentino Rossi at Laguna Seca. 50th Anniversary bike (red/white/green): Set your season to 2005 and win a quick race with Valentino Rossi at Valencia. Quick Race Extreme mode and tracks: Win Quick Race in GP mode as Valentino Rossi. Extreme mode 600cc-1200cc: Repeat all seventeen tracks to unlock more Extreme mode tracks.