Bought it from a dealer that hadn't had time to check it over but said it wouldn't idle but was fine otherwise. Turns out the stator was shot. When I went to order a new one for this make and model, it comes up with a different one. By the looks of things, my motor used to be and EFI out of a powder special or similar sled and converted to carbs.
2000 Arctic Cat ZR 600 (Green)
Home made stinger pipe