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Mikuni Problems

Well I finally received my 240z/s30 back from a friend who built my heads and now am having to dial in the carbs. For those who do not know I have an s30 with all matching numbers and vintage parts.


A list of what is exactly on the car will come later as I want to get it running first, so that brings up my next point. If any single person has any suggestions please leave comments in the comment section below.


Mikuni PPH40 Triple Carbs for 240z….a trade


As stated in my previous post I was the proud owner of these Mikuni 40pph carbs for the 240z. In order to run these bad boys I would have needed to clean them up quite well and change out almost all the moving parts, not to mention fuel contaminated parts as well. I had purchased some new old stock (NOS) Carbs exactly like these just, obviously, in new condition from the early nineties. They were a bit pricy but in the end I bought them for a bargain.

You see, the company I purchased the new carbs from, just so happened to buy my old carbs off ebay, unknowingly. With my sale price factored into the new carbs I bough, I received a 28% off of his NOS carbs!!! Luck was on my side on this one. So here are pics of the carbs I sent out.


Here you can see some of the linkage and also the throttle cable that was cut by the previous owner. Yet another cost that would have needed tending.


The linkage and spring components needed replacing as I wouldn’t want throttle problems during highway speeds.




Some people would ask which is better….Weber or Mikuni? To be honest Mikuni carburetors are a little bit easier to tune with simple bolt on and a mild cam compared to the Weber carburetors. Yet the Weber carbs do offer a bit more adjustments for the user and that can help dial out any “hick-ups” throughout the rev range. It might take some time, or a lot of it, to do so. Not to mention Weber offers up to 50mm carbs that are easily accessible to the public here in the US and Mikuni does not as here in the US 44mm is a rare thing to begin with.


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