Ok, after doing quite a bit of searching, it seems no one knows where to locate carb parts for the KZ305 carbs. I keep hearing the only place you can get diaphragms is from Kawasaki for about $90 each, and no jets available, etc.
Someone please correct me if I'm wrong, because I haven't been able to confirm much of this information so far, but the '81-'82 and '87-'88 KZ305's used Keihin CV-32 carbs, which were shared with the early '80's KZ250 and KZ440, and according to one source, also some early '80's KZ750s.
So, assuming that is true, this place should have replacement diaphragms (~$20 each):
jbmindustries.com/Keihin_diaphragm.html
and it appears that jets are available, the Keihin 99101-124:
www.pjmotorsports.com/keihin-jets.html
at least if the description can be believed:
Keihin Notes & Partial Fitment List:
Keihin FCR Horizontal and Downdraft Series carburetors,FCR28, 32, 33, 35, 37, 39, 41mm.
Kawasaki CVK carbs, OEM Primary Main Jet: KZ250 LTD & CSR (80-83), KZ305A/B CSR (81-82), KZ305B CSR Belt (87-88), KZ440A/B/D/G (80-83), KZ750E (80-82), KZ750H LTD (80-83), KZ750N Spectre (82-83).
Just thought someone else might find some of this useful if it is correct, as it has taken me several weeks to find this info.
