noises

Hey I hope you all are doing well, this is my first time posting on this forum. I’m gonna try to be as detailed as possible so hopefully I can get some help from some more experienced fz6r owners… I picked up a 2012 FZ6R 10 days ago with a little under 25k miles for 2k as my first street bike...

So far now, riding for a few months now I'm experiencing some weird flapping noises. Usually it only happens in the first 10 min of riding, if i rev or downshift and rev match I hear the valves or something flapping. When I lightly reved today it just made a huge pop but the bikes was running...