I can try a little bit more advanced ignition, today timed at the modified case mark about 3mm after (clockwise)the std mark. I added a mark when checking TDC with a piston stop. Set F mark at std mark willl advance a bit. I need to listen for pinging. My TMR32 carbs have a whistling sound when twisting the throttle so pinging sound is trickier to hear.
Interesting with fuel consumption experiences of an RC/DP315 cam. My cam has 0.3mm valve lash (as spec).
EDIT: Bike runs better after I advanced the ignition, more power at higher rpm. Turned the base plate ~3mm counterclockwise.
Ignition 'F' was aligned with case mark I made after TDC check (piston stop). Mark 3-4mm after std (clockwise)
This means that F @ idle is aligned with std case mark. I have checked TDC with piston stop 3 times.
If true TDC should align with std mark, ignition still to be 3mm advanced, F vs case mark at Idle 1200-1400 rpm?
(I have tightened the springs)
Fuel consumption to be verified again. Difficult to ride constant 4000-5000 rpm on 5:th gear without twisting it some extra! 
Let's see if 0.6L/10km is possible with DP315
Three mm at the base plate is much less than three mm at the standard case mark. How many degrees off did you measure the standard marks from true TDC?
When holding a steady 110 Kph, do you feel any slight hesitations? I felt these when I had too small pilot jets on my Webers, and my MPG actually went up with larger pilots; those hesitations are wasted fuel, too lean to fully ignite. In your case, a slight needle adjustment might be helpful?
I think the true TDC was off with about 3 degrees. New mark about 3mm to the right (later)
I advanced the plate by 3mm to verify it runs better or not without pinging.
I'll check with ignition timing strobe lamp.
I have tested different jets last year, but with 4-1. Found what bike worked best with. Main jet, pilot, needles and fuel screws. 135, 30, 4:th step (std), 1.5 turns out. (I increased pilots from 27.5 to 30 after I have tried everything else to avoid hesitations in low speed and high oil temp)
(I tested needle in pos 2,3,4,5)
When 4-4 (HM 300 replicas without diffusers) went on I changed main jets from 135 to 132.5, fuel screws from 1.5 turn to 1.
I saw that the pistons looked really coaled on top this winter so I reduced main 1 step more to 130 and bike runs and sounds better with that. Reduced acc pump stroke to min setting too.
I heard pinging when taking off at red light so I increased fuel screws 1/4 which fixed it. Maybe open more as for the 4-1 pipe, 1.5 turns out.
I might be able to advance ignition a little bit more. The carbs have a whistling sound when twisting the throttle so pinging might not be heard in time.
The bike runs very well now, only small adjustments to get good looking plugs/piston crowns and min fuel consumption.
