TBH, I would just go with a tried and true 4 stroke rear mount. The 2 stroke rear mounts are almost always custom and to be able to withstand the vibrations of a 2 stroke and overcome the mounts would require a lot of work. Of course, a 2 stroke engine kit is less expensive than a 4 stroke kit but for the amount of time and money needed to make a proper mount, I think I would just pay extra and take the 4 stroke. That picture looks like the 4 stroke engine is simply on a sturdy rear rack. If so then it really wouldn't be too effort to get a 4 stroke on the back.