Definitely Yama stuff where you might get it on soft parts. For the stuff I know has nothing vulnerable, I use Berryman B-12 Carb and Choke Cleaner. Man alive, that stuff hits oil, grease, whatever and Zowie, it gone right now. Don,t let it sit on paint, either. I keep a can of black rattle on hand whenever I clean the bottom of the bike and touch up whatever gets unpainted. B-12 evaporates clean, and quick spray of water and clean an a whistle.
Peace and Long Ride,
Jeff