I was think more of something like the follow, which is just the first example on the page so just general example. - https://www.youtube.com/watch?v=_KfBklu-qwQ
Even so if something in the chain is not set correctly then adjusting the mixture will be setting it to the wrong adjustment for correct overall set up, it is up to you what you do but my experience is, and I have done it myself, when someone thinks "it won't be that so I won't check" or "I have already checked so no need to check again" Sod's Law things should have been checked or rechecked. Even very experienced professional people can make this mistake.
Some on here may be able to point you to where you might find some sort of copy of the factory workshop manual and Owner's Manual. So do you already know about this car and its settings for say the CB points and spark plugs the engine timing and so on. You have to take a bit of care where you get your information from particularly with the internet and parts suppliers and others databases. On here are owners that have had the Felicia and used it for decades so they (not me) have real world experience and knowledge of what works best with the car in today's world. But as I put generally as a starting point at least following the original Owner's Manual (and factory WSM - workshop manual) is a good place to start, so much has changed for a 25 year old car in 25 years.
Yes I saw that, that is the fuel filter after the fuel pump presumably, I wondered as I do not know if the fuel pump has a built-in filter or a standard factory filter between tank and pump, others would know I do not.
Good. Fair enough. I have put most of what I know so will leave you in the capable hands of the other posters here and others yet to post.
Good luck, let us know how you get along and the outcome.