Most pirated libraries are not legitimately encoded for Kontakt Player. If you own only the free Kontakt Player, the library will run in (20 minutes of noise bursts) unless you manually hack it—which requires cracked Kontakt itself, compounding legal issues.
By using a KONTAKT library with your Yamaha Motif XF, you can: yamaha motif xf kontakt library free full download
If you are looking for high-quality, professional libraries that officially sample the Motif XF for use in Kontakt, consider these sources: Most pirated libraries are not legitimately encoded for