From what I've seen there's a couple active people using those on the 250 forum just ask around I'm sure you'll have good luck. That's funny you've done all the hard work already. Definitely a good write up though.Wow, just got an email back from jettuning saying they canget them again. I believe dynojet isnt making them have a minimum order of 10 anymore.
I find it amusing that this happens after i emailed dynojet with links to this thread etc im sure its just coincedence tho.
But yeh, if I'd waited barely a week i wouldn't have any guess work. That said, the bonus of the wb2 from hardracing is its presetup to give the altered stock O2 sensor.
I'm not sure how the jettuning pcvs work around the O2 on peoples cbr250r.
I might need to join their forums and ask.