Hey guys, So I was talking to a guy and he was telling me about the dyno jet kit stage 3 for his bike and how amazing it is and how much better the bike runs. Currently, I have just a growler slip- on and I read somewhere that having just the slip on will make the bike run Lean and is bad for your engine. I also read that having the Jet kit will fix this issue. Is this true? Is it really bad for my engine and is it worth the investment in a jet kit? I would rather not spend the money if I don't need to because Im happy with the power of my ninja 250 but If its going to affect my engine in the long run Id rather be safe then sorry. Also could anyone recommend any good mechanics to put it in and also any cheap places I can buy a jet kit. Thanks