There is a certain part of sign making (or bike graphics making) where you have to put in some time and effort of your own to solve problems like color matching. That's why $15 of materials is actually worth $250 from an established company that is able to make consistent products that are the right color.
You're trying to make yellow that's a little bit deeper in color and slightly "orangier" than pure yellow. Since nobody else is using the same printer with the same ink and the same media and the same profile and the same overlaminate as you, nobody is going to be able to give you a color mix over the internet and have it be a dead on match to some old graphics you pulled off a bike. It's a trial and error process where you have to make color swatches yourself, print them, laminate them, and compare them to what you're trying to match. If you're trying to do it in CMYK, you might start with C0M0Y100K0, and try adding small amounts of M at a time. If it turns orange without getting dark enough, try adding equal amounts of all the other colors and test again. There might be tools somewhere that can help achieve this faster, but rather than sitting around for someone else to solve your problem, just get after it and do it yourself.