It's been quiet for some time here, but I was corresponding with my engine-guy and HMC to solve the issue with the piston rings.
Today I could measure with good equipment, a micrometre and a bore gauge. I first measured the piston at the skirt bottom wich gave me the former value of 70,13mm. I set the bore gauge to 0,00 using that micrometre and measured the bores of the cylinders, both lengthwise and across at top, middle and bottom, giving me 0,10/0,09; 0,10/0,09; 0,10/0,08 for the left and 0,10/0,09; 0,09/0,09;
0,09/0,08 for the right one. All in all between 0,08 and 0,10mm more than the piston and a maximum inaccuracy of 0,02mm which seems good to me.
I also did some additional measurements on the piston in the same way at skirt bottom, at the pin and just below the oil scraper ring that gave me 70,13/69,94; 70,10/--; 70,04/69,81;. I do not have the second piston at the moment as it still is at the machine shop, but I think it is save to assume it's pretty much the same, as my measurements at the skirt bottom where before.
Now I have to wait what they say and if there are any good rings to fit.
Also I am still waiting for my mudguards and was working hard on my bullet which ceased to work and I could not find the reason - showed it was the regulator and that killed my battery as well as both my ignition coils, as I changed that before testing the voltage...
Well, good thing is, there's always something to happen
Andreas