94 Katana 600 Main Jet Model Number, 100/604 or 102/221?

[encieno]

I'm trying to buy some jets online for my bike. I bought a Dynojet kit a while back, but had a shop put it on... I didn't get the extra jets back and now I need to try a lower size. I noticed http://www.rageperformance.com/carburetorparts.asp#2 says the model is 102/221, I have the 6MM size of jet. Does this matter? I noticed denniskirk.com only has 100/604 which were the 8mm diameter. What size should I be looking for? Does it matter which size I get?
Thanks.

[encieno]

also what is the stock size of the main jet?

[md86]

You can just go to any shop , take one of your jets with you , and say "I need 4 of these , only one size smaller" . Most shops will have at least SOME jets on hand . If not at the parts desk , then service might have some in the back from when other people have kits put in and they don't take the extra jets with them .