I have a 2004 F6 that hit 10,000 miles a few years ago and I thought I would get it to 12,500..... when I passed that I thought 15,000.... when I passed that I thought 17,000..... the sled now has over 20,000 miles with only normal maintenance ( clutches, bearings, 1 new track, slides and carbides) the motor is 100% original and untouched......now the game is to ride it until it blows up...... fyi, its been in the hands of a MTU student in Houghton this winter being beat on and still running.......PS, I ride a four stroke and would never go back to two stroke......love the 4's