Missmatched idle jets?

[fooquestionmark]

My old carbs (89 maybe?) were royally f'd up so I bought a used set off of another member (88). On my 89 carbs the idle jets all are solid with a single hole in the end. On my 88 carbs 3 of the idle jets have holes in the side and 1 does not and has the same markings as the ones in my 89 carbs.

Is this an issue? I'm gonna guess it is. If so should I use the idle jets from my 89 carbs in the 88 carbs?

[arsenic]

WTF is an idle jet.? You mean main jets? Pilot jets? Pilot air jet?

[Wild-Bill]

Look for the little bitty numbers on the sides or ends of the jets. Can't speak for the 600s but 1989-1996 750s all had the same jetting. Needle Jets were all Y-1, Pilot jets were 32.5s, Main air jets are .5mm, starter jets #37.5 and Main jets were 105s on 1,2&4 and a 110 on #3. Probably wouldn't hurt to re-use the jets from your 89 carbs if you can get them cleaned out. If not, you might want to just pick up new ones.

[fooquestionmark]

WTF is an idle jet.? You mean main jets? Pilot jets? Pilot air jet?

Pilot jet
Don't they control idle?

[arsenic]

the hole in pilot jets are friggin tiny, and on pre's the are under a rubber cover, down in a tube, I kinda think you're talking about main jets, or am I wrong? N/M on 88-89 600 carbs the pilot jets not a pita to get to, let me check on that for ya.
pilot jets
California - 37.5
except California- 32.5
so yes, they all should be the same - 32.5

[md86]

No , my pilot jets were changed by the PO . It CAN happen . On top of THAT , I also had mismatched jets . Same SIZES , but 2 different TYPES , which ended up killing my #1 cylinder . So yeah , make sure you got the right jets . With the BST36SS carbs , you want the 32.5's , and make sure they got all the right holes in 'em , or you'll slowly trash YOUR engine , too ....

[arsenic]

your garage says "91 Katana". Now, a 91 is BST33SS carbs. Your talking about 88-89 carbs which are BST31SS carbs. So, what do you have?

[fooquestionmark]

your garage says "91 Katana". Now, a 91 is BST33SS carbs. Your talking about 88-89 carbs which are BST31SS carbs. So, what do you have?

I have the BST31SS I bought the bike with a rebuilt title and it came with these carbs. Confusing I know because I don't have the nipples on the intake tubes to sync them (but I bought new ones). I bought another set of BST31SS's to fix my old ones though I found I can't fix my old ones because the previous owner torqued down one of the a/f screws with the fist of god.

I'm just gonna yank the matching pilot jets out of my old carbs and use those.

[md86]

Oh , didn't know it was a 600 we was talking about : . Ok then , don't listen to me on the jet size .

[arsenic]

MD, you're still correct, he needs 32.5 pilot jets