I tried the 3 inch with no changes it worked ok first day on hard pack next time out in fresh snow I could feel every paddle going past the heat exchanger then the belt exploded. I put in the diamond lite changed the drivers and geared down the diamond lite. The sled worked awesome in the next two years I went through one belt and that was a 046. Just in belt savings alone it payed for the diamond lite and drivers. I wouldn't even consider a 3 inch on the mseries with out the changes, if the turbo upgrade was a 10 the 3 inch was a 9. I also put on a suspension coupler and it works excellent the skis barly skim the snow in a climb. The coupler is a cheep alternative to a Kmod or Timbersled skid it is by no means a replacement either way planting the front end is a must. Also on the trail go easy or you will tear off paddles.
