I've got a 2013 HRX With blade brake,its got around 400 hours,just last week i replaced the wheel bearings,I looked around and found out that a 1616 Z Bearing will work in the wheels which is way better than the factory ones,Other parts replaced are blade brake hub bearing,2 new pinion gears and re shimmed the rear drive wheels a few times and just replaced the wax actuator for the choke......