It's a typo, the snowmobile was a "phazer" while the bike was a "fazer".
There was also a Vmax snowmobile (and Vmax outboards).
The 80's phazer sleds were sweet. 485cc liquids, really fast for their day. They also run forever, buddy has one. Back in the late 80's Yamaha was the one to beat in the snowmobile market. Today they're more of a niche for people that have to have a four stroke, far and away last place of the major brands.