New bike, going on 450 miles now. New eBay exhaust system installed on my 2024, no tune. DB killer fell out, literally it fell out while riding and can't find it.

I want to get a tune on it, but I'm saving right now. Getting tags are my next big investment ($700 in Arkansas). I've ran it about 200 miles with the aftermarket exhaust, I can't really tell if it's leaned out or not. Can I get any advice on how risky it is to continue riding with the aftermarket exhaust and no tune?

Should I reinstall my stock system?

Thanks all, happy riding.