I think I screwed up trying to buy a jet kit on the cheap. I have a 1990 CBR100F and I bought a K&N jet kit #81-9223 that is actually specified for the 1993-1995 model. I did research before I bought it and found that the carbs are the same for the 1990-1996 models, but I'm not so sure now. To make things worse, I found a listing online saying that the carbs on the 1987-92 are VG80/82 and the 1993-99 are VP45 types.
The Dyno Jet kit apparently is the same for the entire model run of these bikes, according to some websites,and now I'm thinking the K&N kit will be the same. Unfortunately I can't get any numbers for the 1990 jet kit sizes to confirm.
Am I okay with the kit I have? Why do the parts have'DJ' on them (are theyDyno Jet???)

The jet sizes onmy K&N kit are as follows:

Main DJ120 or DJ124
Needle DNO110
SpringsDSP007

The proper kit by Dyno Jet is as follows:

Main DJ114 or DJ118 or DJ122
Needle DNO127
Springs DSP003


Can anyone help me sort out this mess?!

 

The mains in your K&N kit are the same as the ones in my Dyno Jet kit for my '93. I'll check the spring and needles when I get home tonight. My stock main is 122. I'm running the 124's with a K&N filter in the box and an SS2R full system exhaust.
What size are your stock main jets?