It doesn’t sound like there’s anything wrong with it!!! A wet pipe, wet and dark plug are all indications of it being WAY TOO rich! Dry pipe, dry plug, with a light brown color is about what you’re looking for. Open the high needle a bit more then check it again (1/8 turn or so). If it’s wet and dark again, turn it back in to one turn. Try going 7/8 or 15/16 turns on the high and keep an eye on the plug.
Leopards tend to be very forgiving. They run pretty well a little rich. If however the plug starts to look grayish white, it may be a bit too lean. Also as a quick check, pull the pipe off and look in the header. It should be a VERY light shade of tan to almost white. The plug, pipe and top of the piston tells the story. Light tan is what you’re looking for.