My friend has unported stock cylinders, K&N filters, VF3´s, +4 timing, 20cc domes in PD head, T5 pipes and 34PJ´s.
His jetting is 158-162 mains, 48 pilots. I can´t remember his needles, but they are KTM factory needles out of 36PWK´s.
It runs good. CEL or CEK didn´t work with him. The KTM needle is richer down low comparing to CE* needles.
What I´m trying to say is, your 34´s will do fine, you just need to jet them good. Start rich in mains and take your time.