Farr now offers complete bolt it kits for his rotax engines, no frame mod required!
Complete with radiator and fuel cell and airfilter.
I've emailed him asking if I can convert my 470 kit into a bolt in kit.
Mine requires the frame mod detailed on his site.
It looks like he made a new lower engine mount utilizing the watercraft downdraft carbs to gain the required room that the MX style carbs would not allow.
I have already acquired the watercraft carb setup, so I hope I can do without the frame mod, as well as lowering my center of gravity..