great8redsfan

Got myself a 2017 Cub Cadet Challenger 500 for free. It has very low usage and runs like crap (no power going up hills, popping and running rough at WOT in neutral, only 32 mph on flat asphalt) but it was free right? I'm an old ASE Automotive Master Tech and drivability tech from GM that can't figure out a Hisun UTV motor and have no manuals on this thing. I have seen this thing run 45mph but it just started to slowly run more crappy each day. New air filter. I need help guys. Please.