Motocross Madness 2 is considered abandonware. Microsoft no longer sells it, and the original development studio (Rainbow Studios) is now owned by THQ Nordic. In the United States, distributing cracked executables technically violates the DMCA's anti-circumvention provisions. However, if you own an original CD, creating or using a no-CD patch for personal backup and usability falls under fair use (per the 2010 Library of Congress exemption for obsolete DRM).
To get the game running in its "full" glory on modern hardware, you must bypass the CD check using a and apply several modern compatibility fixes. Phase 1: Installing the Full Game motocross madness 2 no cd patch full