One of the (very few) let downs with the VM38-conversion on the Everyday-TR1 is the fact, that I had to sacrifice the original inlet manifolds with their vacuum ports. This in turns meant that I was (up to now) only able to sync the carbs the oldskool-way with a drill under the slide and adjusting the cables to suit. This did indeed work quite well, but after recently adjusting the carbs on a mate's BMW 2002 (without) and especially a Guzzi V7-700 (with vacuum ports), I decided that vacuum ports are actually a must have.
The task itself is nothing to write home about:
1) remove the carbs and put the cylinder you're working on TDC, to make sure the inlet valve is closed and stuff some rag (or paper towel) into the inlet.
Conclusion: It did make quite a difference so far. Mileage has improved notably and I found out that as soon as both cylinders are working as they should, my pilot jets proofed to be too big.
Things I did modify afterwards: I pulled out the vacuum tubes once more and countersounk the holes a bit and then filled the groove with epoxy to improve the seal on the rear cylinder. When the bike is really, really hot I am under the impression that it sucks in some air on the rear cylinder. Nothing dramatic, just a little mod to improve stuff even further.