I just picked up a real clean 1997 Ski Doo Mach 1 700 for $1200 bucks. The sled is in real nice shape, 144 newer studs, plastic skis with newer wear rods and everything works as it should. The Mach 1 has good compression in all three cylinders and has 4071 miles on it. I'm just looking for a little advice on how to keep the sled running well for a couple thousand more miles (hopefully). I have read that these 700 triple motors are "bulletproof" and run great for a long time. I have also read that they are not Ski-Doo's best motor and few of them ever see 5000 miles without blowing. So 2 different opinions on the same motor. Any Ski-Doo buffs out there have any advice or tips on what a guy could do to keep this sled running good for a while before the inevitable meltdown happens? The previous owner says he never had a single problem with the sled and that it always performed awesome. Any advice is appreciated. Thanks!