Bumpers, front and rear, braces or aftermarket a arms, ice storm scratchers( use your scratchers always unless you're off trail in deep snow), pro upper idler wheels, First off I LOVE how this sled handles in the steep trees. These are things to look out for, more than improving the reliability. All this has happened to my 16 SnowCheck. About 200 miles it Started very hard or no start because it flooded out the plugs....TPS needed adjustment 2x. 500 miles relays for EV went bad, 6900 rpm is all I could get. Was just about ready to drop into some nasty terrain when it acted up. 600-700 miles lost 250 RPM, would only tack 7950. 800 miles EV relays went out again( could tap on them and they would work until I shut sled off then act up again)but after replacing them I still had low RPM, 1000 miles the pipe sheared off at muffler(my own diagnosis)motor mounts flexed that much because they were that bad. 1100 miles rod bearing seized. Polaris Gold oil and non ethanol was used. I will never buy a Polaris without a 4 year warranty. Most Axys have been good I just happen to get a Monday, Friday afternoon sled .:juggle: