New exhaust, possibly running rich.
So I just bought a m2 two brothers slip on exhaust for my 2016 kawasaki 636. One of the guys says with the occasional backfiring, that my bike is probably running rich. I emailed Two Brothers and told them about to see what they said "That system is a cat back so your bike should fine, occasional backfire is normal. Your bike was doing it before you just couldn’t hear it because of how chambered the stock exhausts are, and I don’t believe there is any bike in current production that will ever be rich. They run the bikes lean from the factory for emission reasons so when you do anything aftermarket it makes it even more lean but with a cat still there your not making it a completely restriction free system."
Now my question is, is my bike in fact running rich or how can I tell? This is my first sportbike so Im still learning about how everything ticks lol. Also if it is in fact running rich, I was told I need to get it dyno'ed but that it is expensive to do that. I dont have a whole lot of money to do that so if it is running rich, what would happen if I left it like that?