Here's my printouts from 25th March 2013:
The blue line was as I rode in, and the red line is once we'd had a play.
With the blue line I had my "doctored" stacks in, where I've bodged SP1 tops to standard bases, they're longer than stock.
But it ran better with a std pair- one long (rear) and one short, so they are back in for the red trace.
Airbox is gutted, with an enlarged snorkel, and external breathers rather than them routed into the airbox.
I ran out of money to keep trying different setups, but ended up with a 185 front and a 190 rear main jet, needles on 2nd clip from top, both airscrews out 2 turns and 48 pilots.
Engine's currently running high compression pistons, reground cams, 4 degree ignition advancer and I've gasflowed the heads myself, carbs are fitted with a Factory Pro set of needles.
I've ordered a 195 and a 200 main for comparison purposes, but despite trying lots of different settings we couldn't get the slight richness out which shows at 3500.
But it runs cleanly, (once we'd found the misfire, which was affecting top end and turned out to be the sidestand switch).
Here it is through the gears:
However we were having trouble getting a clean ignition pickup, and as you can see the traces aren't exactly overlaid.
Lastly, for comparison, this one shows my original setup run with the high comp/ reground cams engine, just after it was run in, versus the current airbox enhancements:
As can be seen, although the gearing's different (one tooth less gearbox sprocket) it's 2 bhp up and 2 higher on torque as well, so happy enough with that, from the airbox mods.
Let's see what I can get with a full system, ram air, and a remachined front head, maybe oversize inlets, too.
, just the standard set-up 1 long 1 short 
but dont tell anyone .
That is very interesting that the stacks are standard lengths. Now if Mori where doing that for the track then that's got to say something. I think the most important bit is the way the air flows in around the tops. The whole airbox and airflow is so complicated and the smallest changes make a difference. But it's difficult to tell whether a change is beneficial or not. With the two long stacks there is a very noticeable change low/mid revs.
there must be an optimum amount that can be reached per the size of the combustion space and compression for maximum displacement. But this is getting into Boyle's law and Charles's law territory. 