They all test & do their private demo rides in Glamis it seems. Polaris was out there with their latest XP a month or so ago. Several involved with Polaris were invited to drive and give feedback.
But Adam your right Yamaha has been working on something for a while now. What we see today has been in the works for years, and that is for all the manufactures. Almost a year before the XP1000 came out a guy who rides around the Parker AZ got a glimps of what we know as the XP1000 on his GoPro. He had it mounted on his chest protector and as the two past each other you could see the XP had partial body work, a lap top mounted to the passenger grab bar and box strapped to the passenger seat.
Almost two years ago during the V2R I was chasing for the Lofton class 1 car. In the chase truck we all got talking about UTV's. One of the other crew guys was telling me that his son raced outdoor Motocross. He rode a Yamaha and even though a privateer, the manufactures had reps and engineers who spoke with all the riders who rode their bikes. He said the engineer guy with Yamaha (he said his name, but I dont remember) who they had known & seen at most of the races quit showing up to the races. A new guy was showing up, but they did not get to know him, then his son got hurt and had to park the bike for awhile.
Fast forward a year later at Supercross they run into the first guy at Yamaha. They asked him where he went? Expecting to hear him say another company. He said he was still with Yamaha, but he was part of a new R&D dept that was working on recreational vehicles. He said he could not discuss much, but that many guys within the company from several of the different Motorsport Divisions were transferred to this new program.
Shortly after that the Viking was released. Even though its just a rebodied Rhino, it showed that this new division was legit. And as the guy on Lofton's team said, why take members from other Motorsports engineering depts if your only redoing the Rhino? Makes you think Yamaha was investing the time and resources to build other types of vehicles? It will be interesting to see if this is the year Yamaha gets into the Sport Market? Since hearing this years ago I assumed Yamaha would get back into the SXS market, but with what?
Also heard years ago KTM put a recreational vehicle R&D dept together and yet we have never seen anything from them. So I guess just because a manufacture explores the possibility does not mean it will become reality.