Re: 87 Arctic Cat Panther
If I remember right it has a 500cc fan cooled motor with a single Mikuni carb. There should be a lable on the recoil cover with the engine model number. Regarding the idle. There are 2 adjustment screws on the right side of the carb. One is the idle speed scew and sets the slide hieght. The other is the air mixture screw. This adjusts the fuel mixture at low speed. If you are adjusting either of these and it isn't effecting the idle speed it sounds like the pilot circuit is plugged inside the carb. Pull the carb give it a thorough cleaning inside. Make sure you completly disassemble the carb including removing the pilot jet. Make sure the pilot jet isn't plugged. Blow out all the passages with carb cleaner and compressed air. Regarding revving higher. These fan motors never were high revving motors. See were it runs after a good carb cleaning.