T
I have a 2016 M800, sled has run flawlessly for the last two years, but all of a sudden it has started running really bad below 1000 meters (3000ft) Sled runs perfect above that elevation, but lower down on the trail it won't hold revs over 6800 rpm. The sled has a new crate motor, new primary, new ECU, new reeds, powervalves are clean and adjusted. No codes come up. Any ideas? Sled was having the same problem before the new motor, clutch, reeds and ECU.