take it for what this is worth (I ride a MachZ(Kaboom), Not the new etec one either), While Dan, Dave and I were missing the trip to Groomers Office (Winter Gathering) we were in his families Skidoo Dealership getting a helmet fixed, and 1 (Artic Cat) was dragged in with 80+ miles on it, it had an exploded chaincase, Groomer's Nephew said it was the third one this week, same issue.
They have/had there issues, but take it from me, wait till they are worked out. Or I can sell you a real nice MachZ Longtrack, only 1400 miles ..... on this motor....
GutZ