B
Yamaha used to build motors for Honda, and yamaha does not build cars so I can see them using cats chassis. Also yamaha has some new technology in 4 stroke outboard motors that are the lightest in the industry. Combing cat with a new yamaha motor could result in the lightest 4 stroke sled.
those outboard motors are sweet look at them last year fly by wire throttles & almost as light as the 2strokes,i guess mabey yammi wants some of ac tec whatever it is.