Good luck with that mixture screw.  Can you post a picture so we can see what it looks like.  If my memory serves me right, some other members have been able to get those screws out by soaking the screw and cavity with penetrating oil and continually cycling the screw (gently to avoid rounding out the screwdriver slot).

I see your post in the Tech Section regarding the carb kit and all the various new parts.   Can you tell us more about the carb kit?  What is the name of the manufacturer?  Who is the seller?  A pic of the kit would be nice.  I have found the carb kits are a real crap shoot, and they come with a conglomeration of parts that are all chop suey.  Once they start mixing all sorts of non-conforming parts you can end up with a carburetor that is impossible to sort out.  Every circuit (idle, transition, mid & top) will end up grossly out of calibration.

You mentioned that the new idle mixture screw looked good and had a nice plastic protective cover.  Don't fall into that trap.  The kits can look top notch but the only way to know if it has a chance to work is by precise measurement.

This old post provides some useful info on the carb kits.  Compare your parts to the details provided in the post, then let us know how your kit stacks up.  Let us know who makes your kit and who you got it from.  Post a reply to the carb kit post so the info can be captured in that post and other members can benefit.

http://suzukisavage.com/cgi-bin/YaBB.pl?num=1641171298

Thanks guys.

I’m only using the gasket, needle, float valve, and filter screen.  The rest is unmarked and simply going off description by the seller.  I know these kits are a crapshoot.  I thought I might be able to use the air/fuel mix screw if it matched up.  But I can’t get the old one out.  I think it’s just going to stay there and hope it’s okay.  I’ve already scarred the screw head trying to remove it.  Stop before I really screw it up.  I’ll revisit if it leaks or doesn’t work right.

Link to the kit I bought.  I actually bought off a different link by the same seller that didn’t include the description of the parts.  He sent the link to this kit (identical) where he included some description.  He charges $2 more for the kit with the description.  Lol.

https://www.ebay.com/itm/315312946659

I really only bought the kit for the gasket and to look at the parts.  Real Mikuni main and pilot jets are coming from JetsRUs.com.

I know I'm asking for a mess/challenge using anything out of the kit.  You know me!

Photo of the old needle jet.  I did install the new one from the kit that looked identical (except cleaner).

Removing the pilot screw is usually successful by turning the screw back and forth (after you’ve reached the point where it begins to be difficult to turn it)  and slowly extending how far it will turn out.  An occasional drop of machine oil is helpful as you go along.
You’ve got a fair chance of getting it out this way.
Be sure your choice of screwdrivers fits the screw slot fully, for your best result.

It is possible to drill and use an easy-out but it’s not an easy trick to pull off.
I’ve been successful with this maybe 1/3 rd of the time.

Prayer is helpful, before you begin.

The idle fuel/mixture screw can be a difficult thing to remove.  The brass plug that used to block you from accessing it had a small hole in it.  Moisture/water can get in there when it is in place, and the moisture allows the threads in the aluminum body to corrode a bit....and that is what is preventing the screw from coming out.

You can lube the screw and try working it out - the brass is soft and it is very easy to strip the screwdriver slot.  When that happens it become necessary to drill it out and then use an easy out or a Torx bit to extract the screw.  I made a small guide that pushes in the hole and allows me to drill in the center of the mixture screw so that I have the best chance of not disturbing the threads in the carb body. Then I clean up the threads with a tap before I put in a new mixture screw......the tap is very fine thread (still on the road so I cannot tell you the tap size).

Well.  That failed and I screwed up the slot of the screw!  And so the fun begins!

And that’s where I’m at now.  Screwed up the slot.  Is the 1/3 chance for someone as skilled as yourself?  So, I have like a 1/10 chance…right?