15,800 miles on my 2009 XTX. Everything I have done is documented on my Front End+ Rebuild thread... Nothing to engine, not even plugs since I have had her... Pretty much all the normal wear parts, all the bushings and seals, starter. She runs strong, I have learned start with no gas and let warm up thoroughly whether 40 F or -30 F, if I don't, need to add a little throttle and keep revs up just below clutch engagement until warmed up or she stalls. Otherwise, love this sled, dialed in now and even when a friend lets me ride his brand new sled, I want to get back on my super smooth Nytro!