New owner

How do you guys keep the exhaust manifold nuts tight from backing off. Every time i ride they are loose. Will this eventually settle in as the bike get broke in?

Welcome from the twistys of western North Carolina. I have the same issue. Most of mine, sorrily, are now phillips head screws from the hardware store. I keep a couple of extra on me, as they tend to rattle off if I don't monitor them regularly. I might try thin lock washers next.
 
Most Cyanoacrylates degrade at 80°C - so are plain useless for exhausts.
They have a new one that works up to 340°C from memory. No good for the headers but enough for the rest of the exhaust and the engine.