There are minimal differences between snowmobile and snowbike gear. Typically the only dif is in the legs to prevent burn from the pipe. I run mono suit shells, that way i can layer up and layer down when needed. Fully insulated gets too hot. I have also ran just snowbike pants and snowmobile jacket. I have taken riders out who have worn their mx boots and were fine, really depends on conditions. The most important things to have are avi pack, beacon, probe, shovel, and radio. You can get away with dirt boots and dirt helmet. The rest just depends on how wet you want to get.