quick question about drz400

Im sure ill prob catch heat for asking but i searched and couldnt find what i was looking for. a buddy of mine has the drz400s with the 3x3 and james dean jet kit. He just added a yosh rs3 exhaust and the bike wont idle now. what jets does he need to change and what too? i cant for the life of me remember what we put in it the first time. thanks

The pipe will not affect idle.

Perhaps he did not reconnect the vacuum line or it split?

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