looking through those patents. it is 100% based on the arctic cat chassis. the bulk head is the same, a arms, geometry.. everything exempt the triangular support.. that appears to be all new. what's confusing though is it has the arctic cat mountain snowmobile steering column used on the m8000 and the older viper mtx's.. but the seat looks to be the same as the blast seats. my guess would either be yamahas version of the blast or a new mountain sled. But I don't see a point of Yamaha wasting money on making things "lightweight" with all this carbon fiber if there going to use the 3 cylinder four stroke...
Yamaha had built the greatest 2 stoke engine of all time in the banshee race quad... idk why they wouldn't do it again in the snowmobile world