jonbill

Another update to this old thread, since I looked and couldn't find this anywhere. I just got a Hitachi OUP0016 'turbo' oil pump from Rockauto. The pump itself is marked K11 - no other marks, not even a Hitachi logo. But I opened it up and the rotor is indeed 40mm.

Hi, I don't know the Mikunis specifically, I have Dellortos, but the Mikunis look similar. I have modified the pump jets on my carbs to fire at an angle of maybe 22.5 degrees to correct for the curve of the manifold runners. like this: ..../..\...\../.../..\... So - perhaps someone has tried something similar with yours before you had them. And you or someone in between has had the jets out and put them back in the wrong positions. Are yours really 2 straights ahead and 4 to the right? or something more like mine?