Legitimate, scholarly, well-typed, and fully translated Kannada editions (by publishers like Sapna Book House or Ankita Pustaka) are rarely legally available as free PDFs. Authors and translators depend on sales.
While finding a complete, free PDF of the specifically in Kannada can be difficult, online platforms like Google Play Books Internet Archive Kamasutra Book In Kannada Pdf Fr
Here is an informative write-up regarding the Kamasutra in Kannada, its availability, and its content. and its content.