Carbs on a 79F

[Czekus21]

This guy brought me his 79F to look at. Runnin really rich. Took the carbs off, tore them apart, took some pics to show him, then reassembled them. He just got his bike back from the shop for carb work. They were in pretty bad shape after the repair. I told him that he may want to replace them because of the stuff that was broken. He brought me a set of carbs from another XS to look at. These are in better shape with nothing broken inside, although 2 of the jets are stripped and I need to drill them out. Here's the senario.
His bike is a 79F with stock air filter.
OEM header with fish tail exaust. ( 4 into 2 )
No octopuss.
He was told from the person he got the carbs from that they were jetted a little bit bigger then stock.
The 2 jets that I was able to remove are stamped 44.5
Here's the question.
What size should I replace them with?
Should I order them as a kit? or parts individually?
Mike's XS???

Sounds like a bunch of stupid questions but I havn't been in the shop for quite awhile and am suffering from CRS ( Can't Remember S%&t )
I did a search and didn't get my questions answered.

[randy]

IIRC, the stock main jets were 137.5 (37.5 marking). I run a MAC 4-into-2, 140 mains, 24mm floats on my 79F. 144.5 mains is a bit rich.

[81xsproject]

Is there such a jet as 44.5 or 144.5? I thought they were all in increments of 2.5. 137.5, 140, 142.5, 145...

Sounds like a pretty stock set-up. I would go with stock jetting. 137.5M and 42.5P

[DiverRay]

I would go back to the stock jets. You could go up ONE size, if the bottom of the airbox has a few 1/2" holes drilled in it. IF it was me doing the repair, I'd replace the needle and seats on all 4 carbs, as well as the jets. Then CLEAN, inspect the rest of the carbs, CLEAN again, and set the floats. Bench check to verify no fuel leaks, and reinstall and sync.
I do have a few spare parts for '78/'79 carbs, so let me know if you need anything.

[prometheus578]

"I too, need reading glasses or a magnifier when reading jet numbers"

I believe he's referring to the the pilot jets being stripped and can't get them out, not the mains.
I run the same setup(4 into 2). Used the same pilot jets, (42.5)but went up on the mains to 140.
CZEKUS
I just checked the catalogs from every jet maker that I have. Couldn't find any listing for 44.5 jets.
Might I suggest that they actually say 42.5 on the pilots and that your eyes are getting old like mine?
Applications varied over time but the pilots initially were BS30/90 types with the bleed holes. If you order Yamaha parts , they have discontinued using them in our application and show that the 1100 now takes the N151.067 type, with no bleed holes.
Original style is available from many distributors.

Randy... at my age I'm easily confused, but you're not helping me with the numbers you give. Am confused as to which jets you are speaking of.
Mains, as far as I've always seen have the whole number stamped on them, hence a 137.5 states "137.5", not just "37.5."
Now, there is a pilot jet size of 37.5, though, but that is too small for our use.
Please clear this up and help a befuddled old man.

[randy]

I'd really rather you remain befuddled, but glad to help out an old man.

My original MAIN jets are marked "37.5". Why they left off the 1, I cannot guess. All four are the same.

My new MAIN jets are marked 140. Pilots are originals, 42.5.

[Czekus21]

Thanks for the input of my age. who knew. and as I always say, Whoda thunk it.
I'll recheck them when I get home. Still have the issue of removing the old ones. Stripped is only good with a person of the opposite gender.
I'll post agian what I find.