BVC Trikes recently have made a trike conversion of the Husqvarna TX300 Two Stroke.. This company transform mx bike to 3-wheeler, here is the link of the web https://bvctrikes.com/pages/custom-build-pricing-info
This kind of conversion costs approximately around $8500-9500 this price only include the conversion and parts.
Definitely something interesting to try a Husqvarna TX 300 Two Stroke 3-Wheeler, you can check the video down bellow of the power of this machine !!