A couple of buddies were riding up in the Forks in Maine over the weekend. They saw a f-7 towing an f-7. Had a broken chaincase. Later in the day they ran into these two guys and the other sled blew the motor. My friends were all on AC's. One guy Dave has an f-7 and had no problems whatsoever with it. My friend who is a Skidoo guy, absolutely loved the f-7 and couldn't stop raving about the power.