Ok my son bought a brand new ski-doo 850 sled off the show room floor. Ready to run. O miles on it. At 1.9 miles he blows the motor. Any one ever hear of any thing like this? Wrist pin came out trashed cylinder, head and the bottom end. Even the manager said in 20 years he has never seen any thing like that. What are your thoughts.? Rutnbuck