New Zealand Datsun Club

Mikuni's are a greaat carb, but they're a bit of an orphan for parts in this part of the world.

^ that's what I was thinking. Might go with webers for that reason.

I run Dellortos as the Factory 1200sss did, I am very happy with them, but hear the OER carbs flow better than Webers or Dellortos, and also I have heard Italian Webbers are good, Spanish are not.
This is not scientific but may give you some leads to investigate, particularly if you are looking for every last Hp.
All the best

Well I am running the standard sss twin SU carbs... am I going to get much of an power increase going to 45 DCOE webers? To be honest sound is a big part of my decision too...

You will be able to run a much more aggressive cam with Fixed venturi carbs, (as opposed to the SU ones) so more power, and much better sound
1200sss are NZ only and ran Dellorto DLHA40s, (like Webbers) where as GX 1200s ran the SUs Dellortos gave much more power.

Probably a bit subjective re dellortos vs SU's, as the A12 engines were quite different between SSS & GX ie for one the GX had the big oval port performance head as well as differing camshaft & exhaust specs too

Off wiki:

SSS (NZ built up)
Performance
The SSS had 55 road horsepower, compared to about 40rhp for a good standard 1200, and an increase in engine bhp from 69 to about 90bhp. The motor develops the extra horses at the same rpm. And the mild camshaft offers a wide power range.

http://datsun1200.com/modules/mediawiki ... n_1200_SSS" onclick="window.open(this.href);return false;


Performance
A12GX 83 horsepower Twin carb Datsun B110

http://datsun1200.com/modules/mediawiki ... 2GX_Engine" onclick="window.open(this.href);return false;